Evaluate
\left(a+4\right)^{2}
Expand
a^{2}+8a+16
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\left(-a\right)^{2}-8\left(-a\right)+16
Use binomial theorem \left(p-q\right)^{2}=p^{2}-2pq+q^{2} to expand \left(-a-4\right)^{2}.
a^{2}-8\left(-a\right)+16
Calculate -a to the power of 2 and get a^{2}.
a^{2}+8a+16
Multiply -8 and -1 to get 8.
\left(-a\right)^{2}-8\left(-a\right)+16
Use binomial theorem \left(p-q\right)^{2}=p^{2}-2pq+q^{2} to expand \left(-a-4\right)^{2}.
a^{2}-8\left(-a\right)+16
Calculate -a to the power of 2 and get a^{2}.
a^{2}+8a+16
Multiply -8 and -1 to get 8.
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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
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