0
Anonymous
A monomial in the variable x.
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4x2 + 28x + 49 = 4x2 + 14x + 14x + 49 = 2x(2x + 7) + 7(2x + 7) = (2x + 7)(2x + 7) or (2x + 7)2
-7 +2x = x + 8 2x - x = 7 + 8 x = 15
14
5x - 3 + 2x + 7 = ?7x + 5 = ?
X=7