(3x + y)(3x - y)
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4a2 + 4ab - y2 + b2 You cannot simplify this expression because it does not contain like terms, but you can factor it such as: 4a2 + 4ab - y2 + b2 = (4a2 + 4ab + b2) - y2 = (2a + b)2 - y2 = [(2a + b) - y][(2a + b) + y]
All you can do to factor that expression is to divide both terms by y: y2 + 4y = y(y + 4)
If im not mistaken, it should be 2.
-9x 2 -12x+5 =
factor 4y - 32