McGraw Hill Integrated II, 2012
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McGraw Hill Integrated II, 2012 View details
Study Guide and Review
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Exercise 27 Page 81

Us the area formula with l = 5x-4 and w=2x+3.

A=10x^2+7x-12

Practice makes perfect
Recall that to find the area of a rectangle we need to multiply the length and the width. Let's use l = 5x-4 and w=2x+3 from the image.
A = l * w
A = ( 5x-4)( 2x+3)
A = 5x(2x+3) - 4(2x+3)
A = 10x^2+15x - 4(2x+3)
A = 10x^2+15x - 8x-12
A = 10x^2+7x-12