Question

How do you solve this?

Answer 1

Hello from MrBillDoesMath!

Answer:

x = 50

Discussion:

(4x +5) ( 2x - 2) =  8x^2 - 8x + 10x - 10        

                          = 8x^2 + 2x - 10                             (A)

(16x^8)/(2x^6)  + 90 =   8x^2 + 90                           (B)

Setting (A) = (B) gives

8x^2 + 2x - 10 = 8x^2 + 90

Subtract 8x^2 from both sides:

2x - 10 = 90

Add 10 to both sides:

2x = 90 + 10 = 100

Divide both sides by 2:

x = 100/2 = 50

Thank you,

MrB