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How do you work out what x and y are equal to using x squared plus y squared equals 25 and y equals 3x plus 1?
Wiki User
∙ 12y ago
since y = 3x+1 we have
y squared =(3x+1) squared
x^2 + y^2 = 25
x^2 + (3x+1)^2=25
x^2 + 9x^2+ 6x+1 = 25
10x^2 + 6x + 1 = 25
10x^2 + 6x -24 = 0
solve x from quadratic formula
x = 1.28
y = 3x + 1 = 4.83
Wiki User
∙ 12y ago
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