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02-04-2017
Mathematics

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The area of a rectangle is 56 cm. The length is 2 cm more than x and the width is 5 cm less than twice x. Solve for x. Round to the nearest whole number.

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Vesper02 Vesper02

02-04-2017

(2 + x) x (2x-5) = 56

(2+x)(2x-5)=56

2x² - x - 10 = 56
+10 +10

2x² - x = 66

2x² - x - 66 = 0

x = 6

2(6)² - (6) = 66
2(36) - 6 = 66
72 - 6 = 66
66 = 66

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