I'm having trouble with this factorisation question: x^2 + 2ax + a^2 - b^2
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Originally Posted by acevipa I'm having trouble with this factorisation question: x^2 + 2ax + a^2 - b^2 $\displaystyle = (x^2 + 2ax + a^2) - b^2$ $\displaystyle = (x + a)^2 - b^2$ which is a difference of two squares: $\displaystyle = (x + a - b)(x + a + b)$
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