Factorise 3x^3y^2-6x^2y+9xy
look for a common factor. See that 3 divides 3, -6 and 9. Then see that x and y divide the equation also. so write 3xy(x2y-2x+3) and this is your answer.
AS
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Solve 3x^2 + 13x + 14 = 0
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Expand and simplify: (5w-6)(2w+7)