Evaluate : (7x + 15y) (5x − 4y) - Vidyadip

Question

Evaluate : $(7x + 15y) (5x − 4y)$

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Answer

$ (7x + 15y) (5x − 4y)$
$= 7x (5x − 4y) + 15y (5x − 4y)$
$= 35x^2 − 28xy + 75xy − 60y^2$
$= 35x^2 + 47xy − 60y^2$

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