Evaluate
-\left(x^{2}-3x+4\right)
Expand
-x^{2}+3x-4
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x^{2}-3x-2-2x^{2}+6x-2
To find the opposite of 2x^{2}-6x+2, find the opposite of each term.
-x^{2}-3x-2+6x-2
Combine x^{2} and -2x^{2} to get -x^{2}.
-x^{2}+3x-2-2
Combine -3x and 6x to get 3x.
-x^{2}+3x-4
Subtract 2 from -2 to get -4.
x^{2}-3x-2-2x^{2}+6x-2
To find the opposite of 2x^{2}-6x+2, find the opposite of each term.
-x^{2}-3x-2+6x-2
Combine x^{2} and -2x^{2} to get -x^{2}.
-x^{2}+3x-2-2
Combine -3x and 6x to get 3x.
-x^{2}+3x-4
Subtract 2 from -2 to get -4.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
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y = 3x + 4
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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}