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(28 = A7 =%} |
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Answer» (x - 2y - 5z)² Use (a+b+c)² = a²+b²+c² + 2(ab+bc+ac) x² + (-2y)² + (-5z)² + 2 ( -2xy - 5xz + 10yz) x² + (-2y)² + (-5z)² - 4xy - 10xz + 20yz Hit like and BeScholr |
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