Step-by-step explanation:
9r²-25=0
9r²=25
√9r² = √25
3r = 5
3r/3 = 5/3 {divide both sides by 3}
r=5/3
= 9r²=25
= r²= 25
9
=r ± ⁵
³
= r = 5
3
= r1 = –5,r2 = 5 or r1= – 1.6
3 3
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Answers & Comments
Step-by-step explanation:
9r²-25=0
9r²=25
√9r² = √25
3r = 5
3r/3 = 5/3 {divide both sides by 3}
r=5/3
Step-by-step explanation:
9r²-25=0
= 9r²=25
= r²= 25
9
=r ± ⁵
³
= r = 5
3
= r = 5
3
= r = 5
3
= r1 = –5,r2 = 5 or r1= – 1.6
3 3