Find the product of (7x + 15y ) ( x 2 +3y ) and verify the result for x = 2 and y = 1.
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Answer:
(7x +15y) (x2+3y) = 7x3+15x2y+21xy+45y
verification
put x=2 and y=1
(14+15) (4+3) = 56+60+42+45
29×7 = 203
203 = 203
LHS= RHS
verified
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