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Gre4nikov [31]
3 years ago
5

Solve y=x2-5 for x.

Mathematics
1 answer:
faltersainse [42]3 years ago
7 0
Answer: x=+/- square root of y+5 (A, i think this one kinda confused me)

y=x^2-5
substitute y for 0
0=x^2-5
subtract x^2 on both sides
-x^2=-5
since they both can be negative and positive change signs to positive to be easier
x^2=5
square root both sides
x=+/- square root of 5
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