4x
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2x2 + 7x + 6 = 2x2 + 4x + 3x + 6 = 2x(x + 2) + 3(x + 2) = (x + 2)(2x + 3)
3x + 4x = 847x = 84divide both sides by 7x = 12
It equals 53X- a number is squared when it is multiplied by itself, so 7X by 7X = 49X. 2X by 2X =4X, so 49X + 4X is 53X.
11
7x2 -4x -5x2 +2x = 2x2 -2x