Evaluate
\left(4-x\right)\left(9x+7\right)
Expand
28+29x-9x^{2}
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16-x^{2}+29x+12-8x^{2}
Use the distributive property to multiply 4-x by 8x+3 and combine like terms.
28-x^{2}+29x-8x^{2}
Add 16 and 12 to get 28.
28-9x^{2}+29x
Combine -x^{2} and -8x^{2} to get -9x^{2}.
16-x^{2}+29x+12-8x^{2}
Use the distributive property to multiply 4-x by 8x+3 and combine like terms.
28-x^{2}+29x-8x^{2}
Add 16 and 12 to get 28.
28-9x^{2}+29x
Combine -x^{2} and -8x^{2} to get -9x^{2}.
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