Evaluate
\left(b+2\right)\left(b+7\right)
Expand
b^{2}+9b+14
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b^{2}+10b+25-\left(b+5\right)-6
Use binomial theorem \left(p+q\right)^{2}=p^{2}+2pq+q^{2} to expand \left(b+5\right)^{2}.
b^{2}+10b+25-b-5-6
To find the opposite of b+5, find the opposite of each term.
b^{2}+9b+25-5-6
Combine 10b and -b to get 9b.
b^{2}+9b+20-6
Subtract 5 from 25 to get 20.
b^{2}+9b+14
Subtract 6 from 20 to get 14.
b^{2}+10b+25-\left(b+5\right)-6
Use binomial theorem \left(p+q\right)^{2}=p^{2}+2pq+q^{2} to expand \left(b+5\right)^{2}.
b^{2}+10b+25-b-5-6
To find the opposite of b+5, find the opposite of each term.
b^{2}+9b+25-5-6
Combine 10b and -b to get 9b.
b^{2}+9b+20-6
Subtract 5 from 25 to get 20.
b^{2}+9b+14
Subtract 6 from 20 to get 14.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
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699 * 533
Matrix
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
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
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}