# fill in the blanks of this proof showing (x+4)(x-7) is equivalent to x^2-3x-28

Sep 12th, 2015
Anonymous
Category:
Mathematics
Price: \$5 USD

Question description

using commutative property, associative property, or distributive property.

(x+4)(x-7) = x(x+4)-7(x+4)   _________________
= (x+4)x+(x+4)(-7) _________________
= x^2+4x-7x-28 ________________

= x^2 +(4x-7x)-28 _______________

= x^2-3x-28 _______________

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