Evaluate
4\left(x-2\right)\left(x+1\right)
Expand
4x^{2}-4x-8
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4x^{2}-4x+1-9
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(2x-1\right)^{2}.
4x^{2}-4x-8
Subtract 9 from 1 to get -8.
4x^{2}-4x+1-9
Use binomial theorem \left(a-b\right)^{2}=a^{2}-2ab+b^{2} to expand \left(2x-1\right)^{2}.
4x^{2}-4x-8
Subtract 9 from 1 to get -8.
Examples
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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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