Solve for k (complex solution)
k=\frac{3x^{2}+5}{x^{2}+2}
x\neq -\sqrt{2}i\text{ and }x\neq \sqrt{2}i
Solve for k
k=\frac{3x^{2}+5}{x^{2}+2}
Solve for x (complex solution)
x=-i\left(3-k\right)^{-\frac{1}{2}}\sqrt{5-2k}
x=i\left(3-k\right)^{-\frac{1}{2}}\sqrt{5-2k}\text{, }k\neq 3
Solve for x
x=\sqrt{\frac{2k-5}{3-k}}
x=-\sqrt{\frac{2k-5}{3-k}}\text{, }k\geq \frac{5}{2}\text{ and }k<3
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x=kx^{2}+x-3x^{2}+2k-5
Use the distributive property to multiply 1-3x by x.
kx^{2}+x-3x^{2}+2k-5=x
Swap sides so that all variable terms are on the left hand side.
kx^{2}-3x^{2}+2k-5=x-x
Subtract x from both sides.
kx^{2}-3x^{2}+2k-5=0
Combine x and -x to get 0.
kx^{2}+2k-5=3x^{2}
Add 3x^{2} to both sides. Anything plus zero gives itself.
kx^{2}+2k=3x^{2}+5
Add 5 to both sides.
\left(x^{2}+2\right)k=3x^{2}+5
Combine all terms containing k.
\frac{\left(x^{2}+2\right)k}{x^{2}+2}=\frac{3x^{2}+5}{x^{2}+2}
Divide both sides by x^{2}+2.
k=\frac{3x^{2}+5}{x^{2}+2}
Dividing by x^{2}+2 undoes the multiplication by x^{2}+2.
x=kx^{2}+x-3x^{2}+2k-5
Use the distributive property to multiply 1-3x by x.
kx^{2}+x-3x^{2}+2k-5=x
Swap sides so that all variable terms are on the left hand side.
kx^{2}-3x^{2}+2k-5=x-x
Subtract x from both sides.
kx^{2}-3x^{2}+2k-5=0
Combine x and -x to get 0.
kx^{2}+2k-5=3x^{2}
Add 3x^{2} to both sides. Anything plus zero gives itself.
kx^{2}+2k=3x^{2}+5
Add 5 to both sides.
\left(x^{2}+2\right)k=3x^{2}+5
Combine all terms containing k.
\frac{\left(x^{2}+2\right)k}{x^{2}+2}=\frac{3x^{2}+5}{x^{2}+2}
Divide both sides by x^{2}+2.
k=\frac{3x^{2}+5}{x^{2}+2}
Dividing by x^{2}+2 undoes the multiplication by x^{2}+2.
Examples
Quadratic equation
{ 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}