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Armando Snow
Mathematics
20 May, 18:53
If x = - 2 and x^2+y^2+3xy = -5, then find y
+2
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Mohammed Dunlap
20 May, 19:07
0
y = 3
Step-by-step explanation:
Given:
x²+y²+3xy = -5 and x = - 2
Substituting x=-2 into the equation:
(-2) ² + y² + 3y (-2) = - 5
4 + y² - 6y = - 5
y² - 6y + 4 + 5 = 0
y² - 6y + 9 = 0 (solve by factorization)
(y-3) (y-3) = 0
y = 3
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