Mathematics · Algebra

If a = 89, b = -69, and c = 8, then find the value of 9(a + b)2 + 49c2 - 42(a + b)c.

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If a = 89, b = -69, and c = 8, then find the value of 9(a + b)2 + 49c2 - 42(a + b)c.

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If a = 89, b = -69, and c = 8, then find the value of 9(a + b)2 + 49c2 - 42(a + b)c.

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