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9y^{2}+18y-7
Evaluate
\left(3y-1\right)\left(3y+7\right)
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9y^{2}+21y-3y-7
Apply the distributive property by multiplying each term of 3y-1 by each term of 3y+7.
9y^{2}+18y-7
Combine 21y and -3y to get 18y.
9y^{2}+21y-3y-7
Apply the distributive property by multiplying each term of 3y-1 by each term of 3y+7.
9y^{2}+18y-7
Combine 21y and -3y to get 18y.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
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\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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