Question

use the identy (x+4) (x+b) = x²+ (a+b) x+ ab to find the product of (x+3) (x+7)

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Answer 1

PLEASE REFER THE PIC.....

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Answer 2

Given: (x+3)(x+7)

=x

2

+(3+7)x+3×7

=x

2

+10x+21

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