Evaluate
\left(x-3\right)\left(x+4\right)
Expand
x^{2}+x-12
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\left(x+4\right)\left(x-3\right)
Use the distributive property to multiply 1 by x+4.
x^{2}-3x+4x-12
Apply the distributive property by multiplying each term of x+4 by each term of x-3.
x^{2}+x-12
Combine -3x and 4x to get x.
\left(x+4\right)\left(x-3\right)
Use the distributive property to multiply 1 by x+4.
x^{2}-3x+4x-12
Apply the distributive property by multiplying each term of x+4 by each term of x-3.
x^{2}+x-12
Combine -3x and 4x to get x.
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