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Omni-MATH / The real numbers x,y and z satisfy the three equations x+y=7, xz=−180, and (x+y+z)²=4. If S is the sum of the two possible values of y, what is −S? · Discussion

Discussing The real numbers x,y and z satisfy the three equations x+y=7, xz=−180, and (x+y+z)²=4. If S is the sum of the two possible values of y, what is −S? · Omni-MATH

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