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8. If x= -2 and x2 and x2+ y2+3xy= -5 , then find y. |
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Answer» x²+y²+3xy = -5 (-2)²+y²+3(-2)y = -5 4+y²-6y = -5 y²-6y = -9 y²-6y+9 = 0 (y-3) (y-3) y = 3 |
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