McGraw Hill Integrated II, 2012
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McGraw Hill Integrated II, 2012 View details
6. Solving x^2+bx+c=0
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Exercise 31 Page 49

Factor the given expression.

(x-6) feet

Practice makes perfect

The area in square feet of a rectangle is represented by the expression below. x^2-4x-12 We know that its length is (x+2) feet. To find the width we need to factor the given expression.

x^2-4x-12
x^2-6x+2x-12
â–¼
Factor out x & 2
x(x-6)+2x-12
x(x-6)+2(x-6)
(x+2)(x-6)=0

Since (x+2) is the length, (x-6) represents the width.