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Arte-miy333 [17]
3 years ago
11

X^2+y^2=49 , y=7-x solve it in substitution

Mathematics
1 answer:
pashok25 [27]3 years ago
3 0
X^2+(7-x)^2=49
x^2+x^2-14x+49=49
2x^2-14x=0
2x(x-7)=0
x=0, x=7
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