Question

Calculati a)-√5x+2,5=0 b)1 supra x-1=2
DAU CORANĂĂĂĂ

Answer 1

a) -√5x + 2,5 = 0

2,5 = √5x

x = 2,5/√5

x = 2,5√5/5

x = √5/2

1/x - ˣ⁾1 = ˣ⁾2

1 - x = 2x

1 = 2x + x

3x = 1

x = 1/3

sau

1/(x - 1) = 2

1 = 2(x - 1)

1 = 2x - 2

1 + 2 = 2x

2x = 3

x = 3/2