(x+y)^2-(9xy-6x^2)= how do you work this problem?
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Expand the brackets and collect like terms. If you cannot remember the formula for $\displaystyle (x+y)^2$ then multiply out (x+y)(x+y).
Okay so I get x^2 + xy + yx +y^2 is this right and what can I do with the second set of terms?
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