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17 votes
Just please help me!!!!!

Just please help me!!!!!-example-1

2 Answers

14 votes

Answer:

n= 5/3 or 1.67

Explanation:

9n^2 -9 =16

9n^2 = 16 + 9

9n^2 = 25

n^2 =25/9

n^2 =25/9


√(n^2) = \sqrt{(25)/(9) }

n= 5/3 or 1.67

User Hasan Shouman
by
7.1k points
11 votes


~~~~~~9n^2 -9 = 16\\\\\implies 9(n^2 -1) = 16\\\\\implies n^2 -1 = \frac{16}9\\\\\implies n^2 = (16)/(9)+1\\\\\implies n^2 = (25)/(9)\\\\\implies n=\pm\sqrt{(25)/(9)}\\\\\implies n= \pm\frac 53\\\\\implies n = \pm1.67

User Alex Turbin
by
7.6k points

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