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Simplify.

(x-3)([tex] x^{2} [/tex]-4x-7)

A. [tex] x^{3} [/tex]-3[tex] x^{2} [/tex]+12x+21

B. [tex] x^{3} [/tex]-7[tex] x^{2} [/tex]+19x+21

C. [tex] x^{3} [/tex]-7[tex] x^{2} [/tex]+5x+21

D. [tex] x^{3} [/tex]+[tex] x^{2} [/tex]-5x-21

Respuesta :

The answer is C. Use FOIL rules as you would for a binomial, then combine like terms.

Using FOIL rules, we get:

x^3-4x^2-7x-3x^2+12x+21. 

Combine like terms to get  x^3-7x^2+5x+21 (C)

:)

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