Question

formula of binomial
$(2x + 5) and (3 + x)$
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Answer 1

◆formula of binomial

$(2x + 5)(3 + x)$

$\large{(2x + 5)(3 + x)} \\ = (6x + 2x {}^{2} + 15 + 5x )\\ = 2x {}^{2} + 11x + 15$

$=2x²+(6+5)x+15 \\ =2x²+6x+5x+15 \\ =2x(x+3)+5(x+3) \\ =(x+3)(2x+5)$