Question

2. Use the identity (x + a) (x+b)=x? +(a+b)x+ ab to find the following product
(1) (x + 3) (x + 7)
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Answer 1

Answer:

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Answer 2

Answer:

x^2+10x+21

Step-by-step explanation:

formula given:

(x+a)(x+b) = x^2+(a+b)x+ab

(1) (x+3)(x+7)

Here, x=x,

a=3,

b=7.

(x+3)(x+7) = x^2+(3+7)x+3×7

= x^2+(3x+7x)+21

=x^2+10x+21

There fore, (x+3)(x+7) = x^2+10x+21.

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