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OpenStudy (anonymous):
solve the system of equation { 9x^2 + y^2 = 18 and 9x^2 - y^2 = 18 }
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OpenStudy (anonymous):
after adding these two what u get
OpenStudy (anonymous):
okay i thiknkm i know what to do now :) it just leaves 9x^2 = 18 and then i solve for x..
OpenStudy (anonymous):
y = 0 x= +sqrt of 2 and -sqrt of 2
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