y = - 3 x ^ { 2 } | - 27
Solve for y
y=-81x^{2}
Solve for x (complex solution)
x=-\frac{i\sqrt{y}}{9}
x=\frac{i\sqrt{y}}{9}
Solve for x
x=\frac{\sqrt{-y}}{9}
x=-\frac{\sqrt{-y}}{9}\text{, }y\leq 0
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y=-3x^{2}\times 27
The absolute value of a real number a is a when a\geq 0, or -a when a<0. The absolute value of -27 is 27.
y=-81x^{2}
Multiply -3 and 27 to get -81.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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Linear equation
y = 3x + 4
Arithmetic
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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
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Limits
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