Question

(Please help I don't know how to do this)

If 16x + 16x - 1 = 10, find 22x.

If a2 - b2 = 8 and a*b = 2, find a4 + b4

Answer 1

Answer: See step-by-step below.

Explanation:

First we need to solve the equation, 16x + 16x - 1 = 10.

16x + 16x - 1 = 10

32x-1 = 10

Whatever we do on one side, we have to do on the other.

So, we will add 1 to both sides.

32x - 1 + 1 = 10 + 1

Simplify.

32x = 11

x = 11/32

So, 22x = 22(11/32)

= 121/16

= 7 9/16