SOLUTION: Glendale Community College Mathematics Questions

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Section 10.4
5. solving equation 2, we get y=-x
? 2 + (−?)2 = 8
? = ±2
The solutions are x=2 and y=-2, or x=-2 and y=2
9. Let equation 2 minus equation 1
We get 7? = 28
?=4
When y=4, we can solve that ? = ±3
13. Let equation 1 plus equation 2
We get 2? 2 + ? − 1 = 0
?=
1

When ? = 2 , ? = ±

1
?? ? = −1
2

√14
2

When ?…