Evaluate
21-16x-4x^{2}
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21-16x-4x^{2}
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9x^{2}-14x+12-13x^{2}-2x+9
To find the opposite of 13x^{2}+2x-9, find the opposite of each term.
-4x^{2}-14x+12-2x+9
Combine 9x^{2} and -13x^{2} to get -4x^{2}.
-4x^{2}-16x+12+9
Combine -14x and -2x to get -16x.
-4x^{2}-16x+21
Add 12 and 9 to get 21.
9x^{2}-14x+12-13x^{2}-2x+9
To find the opposite of 13x^{2}+2x-9, find the opposite of each term.
-4x^{2}-14x+12-2x+9
Combine 9x^{2} and -13x^{2} to get -4x^{2}.
-4x^{2}-16x+12+9
Combine -14x and -2x to get -16x.
-4x^{2}-16x+21
Add 12 and 9 to get 21.
Examples
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y = 3x + 4
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Matrix
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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
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