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2y^{2}+4y-9
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2y^{2}+4y-9
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y^{2}-3y-5-\left(-y^{2}\right)+7y-4
To find the opposite of -y^{2}-7y+4, find the opposite of each term.
y^{2}+4y-5-\left(-y^{2}\right)-4
Combine -3y and 7y to get 4y.
y^{2}+4y-9-\left(-y^{2}\right)
Subtract 4 from -5 to get -9.
y^{2}+4y-9+y^{2}
Multiply -1 and -1 to get 1.
2y^{2}+4y-9
Combine y^{2} and y^{2} to get 2y^{2}.
y^{2}-3y-5-\left(-y^{2}\right)+7y-4
To find the opposite of -y^{2}-7y+4, find the opposite of each term.
y^{2}+4y-5-\left(-y^{2}\right)-4
Combine -3y and 7y to get 4y.
y^{2}+4y-9-\left(-y^{2}\right)
Subtract 4 from -5 to get -9.
y^{2}+4y-9+y^{2}
Multiply -1 and -1 to get 1.
2y^{2}+4y-9
Combine y^{2} and y^{2} to get 2y^{2}.
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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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}