Evaluate
b\left(a+2b\right)
Expand
ab+2b^{2}
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2a^{2}+ab-b^{2}-2a^{2}+3b^{2}
Use the distributive property to multiply a+b by 2a-b and combine like terms.
ab-b^{2}+3b^{2}
Combine 2a^{2} and -2a^{2} to get 0.
ab+2b^{2}
Combine -b^{2} and 3b^{2} to get 2b^{2}.
2a^{2}+ab-b^{2}-2a^{2}+3b^{2}
Use the distributive property to multiply a+b by 2a-b and combine like terms.
ab-b^{2}+3b^{2}
Combine 2a^{2} and -2a^{2} to get 0.
ab+2b^{2}
Combine -b^{2} and 3b^{2} to get 2b^{2}.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
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y = 3x + 4
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Matrix
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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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