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I need help with these 2 problems

I need help with these 2 problems
asked 66.3k views
4 votes
I need help with these 2 problems

I need help with these 2 problems-example-1
asked
User Wil Gieseler
by
8.7k points

1 Answer

5 votes
The formula for the area of a rectangle is
b\cdot h, so given that
h=5x+3, b=3x-4, the area of the entire rectangle is
(3x-4)(5x+3)=15x^2-20x+9x-12=15x^2-11x-12.. We now subtract the white part, with area
2x*4x=8x^2, so
15x^2-11x-12-8x^2=7x^2-11x-12
answered
User Youraj
by
8.2k points
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