t = \frac { 1 } { ( - \frac { 1 } { 2 r ^ { 2 } } + \frac { 2 } { b ^ { 2 } } ) } d r
Solve for d (complex solution)
d=-\frac{t}{2r^{3}}+\frac{2t}{rb^{2}}
r\neq 0\text{ and }b\neq 0\text{ and }r\neq \frac{b}{2}\text{ and }r\neq -\frac{b}{2}
Solve for d
d=-\frac{t}{2r^{3}}+\frac{2t}{rb^{2}}
r\neq 0\text{ and }b\neq 0\text{ and }|r|\neq \frac{|b|}{2}
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t=\frac{1}{-\frac{b^{2}}{2b^{2}r^{2}}+\frac{2\times 2r^{2}}{2b^{2}r^{2}}}dr
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of 2r^{2} and b^{2} is 2b^{2}r^{2}. Multiply -\frac{1}{2r^{2}} times \frac{b^{2}}{b^{2}}. Multiply \frac{2}{b^{2}} times \frac{2r^{2}}{2r^{2}}.
t=\frac{1}{\frac{-b^{2}+2\times 2r^{2}}{2b^{2}r^{2}}}dr
Since -\frac{b^{2}}{2b^{2}r^{2}} and \frac{2\times 2r^{2}}{2b^{2}r^{2}} have the same denominator, add them by adding their numerators.
t=\frac{1}{\frac{-b^{2}+4r^{2}}{2b^{2}r^{2}}}dr
Do the multiplications in -b^{2}+2\times 2r^{2}.
t=\frac{2b^{2}r^{2}}{-b^{2}+4r^{2}}dr
Divide 1 by \frac{-b^{2}+4r^{2}}{2b^{2}r^{2}} by multiplying 1 by the reciprocal of \frac{-b^{2}+4r^{2}}{2b^{2}r^{2}}.
t=\frac{2b^{2}r^{2}d}{-b^{2}+4r^{2}}r
Express \frac{2b^{2}r^{2}}{-b^{2}+4r^{2}}d as a single fraction.
t=\frac{2b^{2}r^{2}dr}{-b^{2}+4r^{2}}
Express \frac{2b^{2}r^{2}d}{-b^{2}+4r^{2}}r as a single fraction.
t=\frac{2b^{2}r^{3}d}{-b^{2}+4r^{2}}
To multiply powers of the same base, add their exponents. Add 2 and 1 to get 3.
\frac{2b^{2}r^{3}d}{-b^{2}+4r^{2}}=t
Swap sides so that all variable terms are on the left hand side.
2b^{2}r^{3}d=t\left(-2r+b\right)\left(-2r-b\right)
Multiply both sides of the equation by \left(-2r+b\right)\left(-2r-b\right).
2db^{2}r^{3}=t\left(-2r+b\right)\left(-2r-b\right)
Reorder the terms.
2db^{2}r^{3}=\left(-2tr+tb\right)\left(-2r-b\right)
Use the distributive property to multiply t by -2r+b.
2db^{2}r^{3}=4tr^{2}-tb^{2}
Use the distributive property to multiply -2tr+tb by -2r-b and combine like terms.
2b^{2}r^{3}d=4tr^{2}-tb^{2}
The equation is in standard form.
\frac{2b^{2}r^{3}d}{2b^{2}r^{3}}=\frac{t\left(2r-b\right)\left(2r+b\right)}{2b^{2}r^{3}}
Divide both sides by 2b^{2}r^{3}.
d=\frac{t\left(2r-b\right)\left(2r+b\right)}{2b^{2}r^{3}}
Dividing by 2b^{2}r^{3} undoes the multiplication by 2b^{2}r^{3}.
d=-\frac{t}{2r^{3}}+\frac{2t}{rb^{2}}
Divide t\left(2r-b\right)\left(2r+b\right) by 2b^{2}r^{3}.
t=\frac{1}{-\frac{b^{2}}{2b^{2}r^{2}}+\frac{2\times 2r^{2}}{2b^{2}r^{2}}}dr
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of 2r^{2} and b^{2} is 2b^{2}r^{2}. Multiply -\frac{1}{2r^{2}} times \frac{b^{2}}{b^{2}}. Multiply \frac{2}{b^{2}} times \frac{2r^{2}}{2r^{2}}.
t=\frac{1}{\frac{-b^{2}+2\times 2r^{2}}{2b^{2}r^{2}}}dr
Since -\frac{b^{2}}{2b^{2}r^{2}} and \frac{2\times 2r^{2}}{2b^{2}r^{2}} have the same denominator, add them by adding their numerators.
t=\frac{1}{\frac{-b^{2}+4r^{2}}{2b^{2}r^{2}}}dr
Do the multiplications in -b^{2}+2\times 2r^{2}.
t=\frac{2b^{2}r^{2}}{-b^{2}+4r^{2}}dr
Divide 1 by \frac{-b^{2}+4r^{2}}{2b^{2}r^{2}} by multiplying 1 by the reciprocal of \frac{-b^{2}+4r^{2}}{2b^{2}r^{2}}.
t=\frac{2b^{2}r^{2}d}{-b^{2}+4r^{2}}r
Express \frac{2b^{2}r^{2}}{-b^{2}+4r^{2}}d as a single fraction.
t=\frac{2b^{2}r^{2}dr}{-b^{2}+4r^{2}}
Express \frac{2b^{2}r^{2}d}{-b^{2}+4r^{2}}r as a single fraction.
t=\frac{2b^{2}r^{3}d}{-b^{2}+4r^{2}}
To multiply powers of the same base, add their exponents. Add 2 and 1 to get 3.
\frac{2b^{2}r^{3}d}{-b^{2}+4r^{2}}=t
Swap sides so that all variable terms are on the left hand side.
2b^{2}r^{3}d=t\left(-2r+b\right)\left(-2r-b\right)
Multiply both sides of the equation by \left(-2r+b\right)\left(-2r-b\right).
2db^{2}r^{3}=t\left(-2r+b\right)\left(-2r-b\right)
Reorder the terms.
2db^{2}r^{3}=\left(-2tr+tb\right)\left(-2r-b\right)
Use the distributive property to multiply t by -2r+b.
2db^{2}r^{3}=4tr^{2}-tb^{2}
Use the distributive property to multiply -2tr+tb by -2r-b and combine like terms.
2b^{2}r^{3}d=4tr^{2}-tb^{2}
The equation is in standard form.
\frac{2b^{2}r^{3}d}{2b^{2}r^{3}}=\frac{t\left(2r-b\right)\left(2r+b\right)}{2b^{2}r^{3}}
Divide both sides by 2b^{2}r^{3}.
d=\frac{t\left(2r-b\right)\left(2r+b\right)}{2b^{2}r^{3}}
Dividing by 2b^{2}r^{3} undoes the multiplication by 2b^{2}r^{3}.
d=-\frac{t}{2r^{3}}+\frac{2t}{rb^{2}}
Divide t\left(2r-b\right)\left(2r+b\right) by 2b^{2}r^{3}.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
699 * 533
Matrix
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}