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OpenStudy (anonymous):
Find the solutions to the nonlinear equations y=4x x^2+y^2=68
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OpenStudy (l):
y = 4x -> y^2 = 16x^2 x^2+y^2 = 68 -> y^2 = 68 - x^2 -> 16x^2 = 68 - x^2 -> 17x^2 = 68 -> x^2 = 4 -> x = +2 or -2 y = +8 or -8 respectively *
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