Question

using the identities, find the following product
(x+5) (x+7)
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Answer 1

Answer:

using the identity (X + a)( x + b)= X2+(a +b)x+ab

(x+5)(x+7)=x2+(5+7)x+5×7

=x2+12x+35

Answer 2

Answer:

we know the formula (x+a) (x+b)

= x²+(a+b)x + (ab)

so, (x+5)(x+7) = x²+(5+7)x+(7)(5)

= x²+12x+35