Simplifying Expressions
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How do you use rules when solving these problems? Is it always possible?
(x³-y³) - (-6x³+x²y-xy²+2y³)
(3x-y)(2x+5y)
(7xy²-10y)(7xy²+10y)
(xy+ab²)(xy-ab²)
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1. (x³-y³) - (-6x³+x²y-xy²+2y³)
Solution
(x^3-y^3) -(-6x^3+x^2 y -x y^2 + 2y^3)
= (x^3 -y^3 +6x^3-x^2 y +x y^2 - 2y^3) [Distributed the negative sign]
= ...
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