Help me on my alg 2 final

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Mathematics

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a.perimeter=2(L+W)

2{(3x+7)+(2x-3)}

2(5x+4)

=10x+8

b. area

(3x+7)(2x-3)

3x(2x-3)+7(2x-3)

6x^2-9x+14x-21

=6x^2+5x-21

c.difference in area

(2x+10)(4x-10)

2x(4x-10)+10(4x-10)

8x^2-20x+40x-100

(8x^2+20x-100)-((6x^2-5x-21))

=2x^2+25x-79


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Anonymous
I was struggling with this subject, and this helped me a ton!

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