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They are four terms of an algebraic expression that can't be simplified
4x^2+2xy-3y^2-2x^2+5xy-2y2Collect the like terms=2x^2+7xy-5y^2We cannot factorise it because the end term is a negative whilst the second-last term is positive.
4xy + x3y + yx2 + yx + 3yx = x3y + x2y + 8xy = (xy)(x2y + x + 8)
√18xy = √(9*2xy) = √9*√2xy = 3*√(2xy)
4xy - 2xy