turtleiscool82ca turtleiscool82ca

03-10-2019
Mathematics

contestada

if the dimensions of a rectangle are A plus 3b and A minus 3b what is the area of the rectangle

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mcat989 mcat989

05-10-2019

area=legnth times width

we notice this is a special case

(a+b)(a-b)=a^2-b^2

area=(a+3b)(a-3b)=a^2-9b^2

area=a^2-9b^2

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