Question

using suitable identiti (x+7) (x+3)

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Answer 1

Given -

[x+7] [x+3]

Formulae Used -

[x+a][x+b] is x^2+xa+xb+ab

x^2+x[a+b]+ab

Solution-

[x+7] [x+3]

x^2+7x+3x+21

x^2 +x[7+3]+21

x^2+x[10] +21

x^2+10x+21

Answer 2

Here's your answer

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