Evaluate
\left(2-p\right)^{2}
Expand
p^{2}-4p+4
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\left(-p\right)^{2}+4\left(-p\right)+4
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(-p+2\right)^{2}.
p^{2}+4\left(-p\right)+4
Calculate -p to the power of 2 and get p^{2}.
p^{2}-4p+4
Multiply 4 and -1 to get -4.
\left(-p\right)^{2}+4\left(-p\right)+4
Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(-p+2\right)^{2}.
p^{2}+4\left(-p\right)+4
Calculate -p to the power of 2 and get p^{2}.
p^{2}-4p+4
Multiply 4 and -1 to get -4.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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y = 3x + 4
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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
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Limits
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}