Solve this Quadratic Word Problem | Quick and Easy Method

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Answer the two numbers are 32 and 20
axb=640 and a-b=12 or a= b+12
(b+12)b=640 or b^2 +12b-640= 0 or (b+20)(b-32) or b= 32 or b=-20
Answer 32 and 20

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