Evaluate
\left(4-a\right)\left(a+3\right)
Expand
12+a-a^{2}
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12-3a+4a-a^{2}
Apply the distributive property by multiplying each term of 3+a by each term of 4-a.
12+a-a^{2}
Combine -3a and 4a to get a.
12-3a+4a-a^{2}
Apply the distributive property by multiplying each term of 3+a by each term of 4-a.
12+a-a^{2}
Combine -3a and 4a to get a.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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Matrix
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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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