find the product and verify the result x=-1,y=2 (2x-5y)(x-3y)
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(2x-5y)(x-3y)
(2X-1-5X2)(-1-3X2)
-12×-7
84
verify
(2X-1-5X2)(-1-3X2)=84
-12X-7=84
84=84.
LHS=RHS
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