Mathematics
Booboo14Addy
9

The area of a rectangle is 56 meters. the lengthe th is 2 cm moran x and the width is 5 cm less than twice x. solve for x

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(2) Answers
jtfranks411

You can write the dimensions of the rectangle as (x + 2) and (x - 5), and because the area is base × height, you can multiply the brackets together and make it equal to 56: (x + 2)(2x - 5) = 56 2x² + 4x - 5x - 10 = 56 x² - x - 10 = 56 Now because you have an x², you need to make the equation equal to 0 so you can factorise, so: 2x² - x - 10 = 56 - 56 2x² - x - 66 = 0 (x - 6)(2x + 11) So x is 6, because the other option is -5.5 and you cannot have a negative length. I hope this helps!

madisynobregon2

the answer is 6okay now youll get it rith

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