Evaluate
9x^{4}+21x^{2}-12
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9x^{4}+21x^{2}-12
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3^{2}\left(x^{2}\right)^{2}+\left(3+4\right)\times 3x^{2}+3\left(-4\right)
Expand \left(3x^{2}\right)^{2}.
3^{2}x^{4}+\left(3+4\right)\times 3x^{2}+3\left(-4\right)
To raise a power to another power, multiply the exponents. Multiply 2 and 2 to get 4.
9x^{4}+\left(3+4\right)\times 3x^{2}+3\left(-4\right)
Calculate 3 to the power of 2 and get 9.
9x^{4}+7\times 3x^{2}+3\left(-4\right)
Add 3 and 4 to get 7.
9x^{4}+21x^{2}+3\left(-4\right)
Multiply 7 and 3 to get 21.
9x^{4}+21x^{2}-12
Multiply 3 and -4 to get -12.
3^{2}\left(x^{2}\right)^{2}+\left(3+4\right)\times 3x^{2}+3\left(-4\right)
Expand \left(3x^{2}\right)^{2}.
3^{2}x^{4}+\left(3+4\right)\times 3x^{2}+3\left(-4\right)
To raise a power to another power, multiply the exponents. Multiply 2 and 2 to get 4.
9x^{4}+\left(3+4\right)\times 3x^{2}+3\left(-4\right)
Calculate 3 to the power of 2 and get 9.
9x^{4}+7\times 3x^{2}+3\left(-4\right)
Add 3 and 4 to get 7.
9x^{4}+21x^{2}+3\left(-4\right)
Multiply 7 and 3 to get 21.
9x^{4}+21x^{2}-12
Multiply 3 and -4 to get -12.
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}