Question 1190112
X-2y=10
Y=x^2+2x-15
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2y = x-10
2y = 2x^2 + 4x - 30
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x-10 = 2x^2 + 4x - 30
2x^2 + 3x - 20 = 0
*[invoke solve_quadratic_equation 2,3,-20]
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x = 2.5, y = -3.75
x = -4, y = -7