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OpenStudy (anonymous):
nonlinear equation xsquared+ysquared=25 x+y=7 help please ?
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OpenStudy (anonymous):
substitution
OpenStudy (anonymous):
x^2+y^2=25 x+y=7 x=7-y (7-y)^2+y^2=25
OpenStudy (anonymous):
you know how to solve quadratics?
OpenStudy (anonymous):
a little bit . not my strong point though .
OpenStudy (anonymous):
rewrite it so that one side equals 0, you have to expand (7-y)^2
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OpenStudy (anonymous):
oh ok , that makes more sense . thanks
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