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So we have x^2 + 3*x = 180 --> x^2 + 3*x - 180 = 0. This can factor into (x-12)(x+15)=0, So x = -15 or x = 12 satisfies it: -15 is the answer. I factored by looking for factors which sum to +3 and multiply to -180

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βˆ™ 13y ago
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Pierre Young

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Q: X is a negative integer if you square x then add 3 times x equals 180 what equals x?
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