using a suitable identity find the product (a) (t+5)(t+7)
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(x+a)(x+b)=x²+(a+b)x+ab
= t²+(7+5)t+5(7)
=t²+12t+35
= t²+(7+5)t+5(7)
=t²+12t+35
varun145:
thnks
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