Solve for a (complex solution)
\left\{\begin{matrix}a=-\frac{x^{2}+b^{2}}{2x}\text{, }&x\neq 0\\a\in \mathrm{C}\text{, }&x=0\text{ and }b=0\end{matrix}\right.
Solve for a
\left\{\begin{matrix}a=-\frac{x^{2}+b^{2}}{2x}\text{, }&x\neq 0\\a\in \mathrm{R}\text{, }&x=0\text{ and }b=0\end{matrix}\right.
Solve for b (complex solution)
b=-i\sqrt{x}\sqrt{x+2a}
b=i\sqrt{x}\sqrt{x+2a}
Solve for b
b=\sqrt{-x\left(x+2a\right)}
b=-\sqrt{-x\left(x+2a\right)}\text{, }\left(x\geq 0\text{ or }x\geq -2a\right)\text{ and }\left(x\leq 0\text{ or }x\leq -2a\right)
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2ax+b^{2}=-x^{2}
Subtract x^{2} from both sides. Anything subtracted from zero gives its negation.
2ax=-x^{2}-b^{2}
Subtract b^{2} from both sides.
2xa=-x^{2}-b^{2}
The equation is in standard form.
\frac{2xa}{2x}=\frac{-x^{2}-b^{2}}{2x}
Divide both sides by 2x.
a=\frac{-x^{2}-b^{2}}{2x}
Dividing by 2x undoes the multiplication by 2x.
a=-\frac{b^{2}}{2x}-\frac{x}{2}
Divide -x^{2}-b^{2} by 2x.
2ax+b^{2}=-x^{2}
Subtract x^{2} from both sides. Anything subtracted from zero gives its negation.
2ax=-x^{2}-b^{2}
Subtract b^{2} from both sides.
2xa=-x^{2}-b^{2}
The equation is in standard form.
\frac{2xa}{2x}=\frac{-x^{2}-b^{2}}{2x}
Divide both sides by 2x.
a=\frac{-x^{2}-b^{2}}{2x}
Dividing by 2x undoes the multiplication by 2x.
a=-\frac{b^{2}}{2x}-\frac{x}{2}
Divide -x^{2}-b^{2} by 2x.
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}