Answer:
C.
1.3,-3
2.2,-2
3.9,-9
4.9,-9
5.1,-1
Step-by-step explanation:
solution:
1.x²=9
√x²=±√9
x=±3
x=3,-3
2.2x²=8
√2x²=±√8
x√2=±√4•2
x√2=±2√2
x√2/√2=±2√2/√2
x=±2
x=2,-2
3.81=x²
±√81=√x²
±9=x
x=9,-9
4.2x²=162
√2x²=±√162
x√2=+√81•2
x√2=±9√2
x√2/√2=±9√2/√2
x=±9
5.x²=1
√x²=±√1
x=±1
x=1,-1
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Answers & Comments
Answer:
C.
1.3,-3
2.2,-2
3.9,-9
4.9,-9
5.1,-1
Step-by-step explanation:
solution:
1.x²=9
√x²=±√9
x=±3
x=3,-3
2.2x²=8
√2x²=±√8
x√2=±√4•2
x√2=±2√2
x√2/√2=±2√2/√2
x=±2
x=2,-2
3.81=x²
±√81=√x²
±9=x
x=9,-9
4.2x²=162
√2x²=±√162
x√2=+√81•2
x√2=±9√2
x√2/√2=±9√2/√2
x=±9
x=9,-9
5.x²=1
√x²=±√1
x=±1
x=1,-1