Let a and b be real numbers such that $a+b=-1$. Compute $a^2-b^2+a-b$.
Let a and b be real numbers such that a + b = - 1 . Compute \(a^2-b^2+a-b\).
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\(a + b = - 1\ |\times (a-b)\\ a^2-b^2=-a+b\\ \color{blue}a^2-b^2+a-b=0\)
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