Presumably all the terms are positive?
(2x+7(x+7)
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2x2 + 21x + 49 = 2x2 +14x +7x + 49 = 2x(x + 7) + 7(x + 7) = (2x + 7)(x + 7)
2x2 + 21x + 49= 2x2 + 14x + 7x + 49= 2x(x + 7) + 7(x + 7)= (x + 7)(2x + 7)
196 98x2=196 49x2=98 7x7=49 2x2&7x7
x2+14x+49 = (x+7)(x+7) when factored
Yes.