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OpenStudy (cwrw238):
Question from uk math challenge: How many distinct pairs (x,y) of real numbers satisfy the equation (x + y)^2 = (x + 4)(x - 4) A 0 B 1 C 2 D 3 E 4 I think its B.
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OpenStudy (cwrw238):
ooopps - sorry my error its (x + y)^2 = (x + 4)(y - 4)
OpenStudy (anonymous):
u think right
OpenStudy (cwrw238):
oh - i've assumed they mean real integers
OpenStudy (cwrw238):
-4 and 4 right?
OpenStudy (anonymous):
right
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OpenStudy (cwrw238):
thanks
OpenStudy (anonymous):
np
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