7x2 -4x -5x2 +2x = 2x2 -2x
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It is: 4x squared
8x^2 + 6x - 5 = 8x^2 + 10x - 4x - 5 = 2x * (4x + 5) - (4x + 5) = (2x -1) * (4x + 5)
(2x+3)(2x+4)
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.
4x - 7 = 2x + 5 2x - 7 = 5 2x = 12 x = 6.