a to the power 2 (b-c) +b(c-b)
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Now,
a² (b - c) + b (c - b)
= a² (b - c) + b {- ( - c + b )}
= a² (b - c) - b (b - c)
= (b - c) (a² - b),
which is the required factorization.
Also,
a² (b - c) + b (c - b)
= a²b - a²c + bc - b²,
which is a simplified form.
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