Evaluate
11x^{2}-3xy-y
Expand
11x^{2}-3xy-y
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9x^{2}-2xy-6y+2x^{2}-xy+5y
To find the opposite of -2x^{2}+xy-5y, find the opposite of each term.
11x^{2}-2xy-6y-xy+5y
Combine 9x^{2} and 2x^{2} to get 11x^{2}.
11x^{2}-3xy-6y+5y
Combine -2xy and -xy to get -3xy.
11x^{2}-3xy-y
Combine -6y and 5y to get -y.
9x^{2}-2xy-6y+2x^{2}-xy+5y
To find the opposite of -2x^{2}+xy-5y, find the opposite of each term.
11x^{2}-2xy-6y-xy+5y
Combine 9x^{2} and 2x^{2} to get 11x^{2}.
11x^{2}-3xy-6y+5y
Combine -2xy and -xy to get -3xy.
11x^{2}-3xy-y
Combine -6y and 5y to get -y.
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{ x } ^ { 2 } - 4 x - 5 = 0
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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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