Answer:
- X - 2x = 2x
- X 5y = -5y
(5x - 8y) (2x - 5y)
5x X 2x = 10x^2
5x X -5y = -25xy
-8y X 2x = -16xy
-8y X -5y = 40y^2
therefore
= 10x^2 + 40y^2 -25xy -16xy
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