Question

(x+3)(x+7) by using identities​

Answer 1

$(a + b)(a + c)$

$(x + 3)(x + 7)$

$(x + x)(3 + 7)$

$(2x)(10)$

$2x \times 10$

$20x$

Answer 2

Answer:

by using (x+a)(x+b) = x²+(a+b)x+ab

(x+3)(x+7)

x²+(3+7)x+3×7

x²+10x+21

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