Factorise (5a +3b)² - 3(5a +3b) -28 – InterviewSolution

1.	Factorise (5a +3b)² - 3(5a +3b) -28
Answer» n:- factors >>> (5a+3B-7)(5a+3b+4)Expln:-f(5a+3b) = (5a +3b)² - 3(5a +3b) -28Let x = 5a+3b -- (1) f(x) = x²-3x-28By middle TERM splitting, f(x) = x²-7x+4x-28 = x(x-7)+4(x-7) = (x-7)(x+4)By(1), factors are (5a+3b-7)(5a+3b+4)

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