Question

Just please help me!!!!!

Answer 1

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

Answer 2

`~~~~~~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`