Solve for a
a=-x\left(x-b\right)
x\neq 0
Solve for b
b=x+\frac{a}{x}
x\neq 0
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a=xb-xx
Multiply both sides of the equation by x.
a=xb-x^{2}
Multiply x and x to get x^{2}.
a=xb-xx
Multiply both sides of the equation by x.
a=xb-x^{2}
Multiply x and x to get x^{2}.
xb-x^{2}=a
Swap sides so that all variable terms are on the left hand side.
xb=a+x^{2}
Add x^{2} to both sides.
xb=x^{2}+a
The equation is in standard form.
\frac{xb}{x}=\frac{x^{2}+a}{x}
Divide both sides by x.
b=\frac{x^{2}+a}{x}
Dividing by x undoes the multiplication by x.
b=x+\frac{a}{x}
Divide a+x^{2} by x.
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}