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15) A = 3x - 5 B = -4x + 2 What's A-B? What's B-A?
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15) A = 3x - 5 B = -4x + 2 What's A-B? What's B-A?

User Azrael
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A = 3x - 5 B = -4x + 2 What's A-B? What's B-A?​

Part 1

A-B

substitute

(3x-5)-(-4x+2)

remove the parenthesis

3x-5+4x-2

combine like terms

7x-7

Part 2

B-A

(-4x+2)-(3x-5)

remove parenthesis

-4x+2-3x+5

combine like terms

-7x+7

User Hmahwish
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