Q) Find the product using the~ identity (x+a)(x+b)=x²+(a+b)x+ab
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(i) (x+7)(x+5)
(ii) (7x+2y)(7x+6y)
(iii) 98 × 97
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Step-by-step explanation:
(i) (x+7)(x+5)
x^2+(7+5)x+7×5
x^2+12x+35
(ii) (7x+2y)(7x+6y)
(7x)^2+(2y+6y)7x+2y×6y
49x^2+84xy+12y^2
(iii) 98 × 97
(100-2)(100-3)
(100)^2+[-2-3]100+(-2)(-3)
10000-500+6
9500+6
9506
Hope it's help u!!
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