Question

Решите уравнение
2^2x^2+5x-4=0.5

Answer 1

2^2x^2+5х -4 = 2^-1
2x^2 +5x -4 = -1
2x^2 +5x -3 = 0
x = 1/2   и     х = -3

Answer 2

2*2x*2+5x-4=0.5
4x*2+5x-4=0.5
8x+5x-4=0.5
13x-4=0.5
13x=0.5+4
13x=4.5
x=4.5:13
x=0.3461538461538462