Step-by-step explanation:
Ito po oh Sana. makatulong
Answer:
1. k²=16
√k²=√16
k=+4
k=-4
Check:
>k=4
>k²=16
(4)²=16
16=16✓
>k=-4
(-4)²=16
2. r²=81
√r²=√81
r=9
r=-9
>r=9
>r²=81
(9)²=81
81=81✓
>r=-9
r²=81
(-9)²=81
81=81
3. 3x²-100=0
x²-100+100=0+100
x²=100
√x²=√100
x=10
x=-10
>x=10
x²-100=0
(10)²-100=0
100-100=0
0=0✓
>x=-10
(-10)-100=0
4. 2s²=50
√2s²=√50
s²=25
√s²=√25
s=5
s=-5
#Carry on learning
Hope it helps
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Answers & Comments
Step-by-step explanation:
Ito po oh Sana. makatulong
Answer:
1. k²=16
√k²=√16
k=+4
k=-4
Check:
>k=4
>k²=16
(4)²=16
16=16✓
>k=-4
>k²=16
(-4)²=16
16=16✓
2. r²=81
√r²=√81
r=9
r=-9
Check:
>r=9
>r²=81
(9)²=81
81=81✓
>r=-9
r²=81
(-9)²=81
81=81
3. 3x²-100=0
x²-100+100=0+100
x²=100
√x²=√100
x=10
x=-10
Check:
>x=10
x²-100=0
(10)²-100=0
100-100=0
0=0✓
>x=-10
x²-100=0
(-10)-100=0
100-100=0
0=0✓
4. 2s²=50
√2s²=√50
s²=25
√s²=√25
s=5
s=-5
#Carry on learning
Hope it helps
Mark me the Brainliest