Question

1. (25 p) Rezolvaţi ecuațiile: a) 3(x - 1)+5 = 4x-2; b) x2 + x -2=0.​

Answer 1

a) 3(x-1) + 5 = 4x-2

3x - 3 + 5 = 4x-2

3x + 2 = 4x - 2

3x-4x = -2-2

-x = -4

x = 4

b) x²+x-2 = 0

x²+ 2x-x - 2 = 0

x(x+2) - (x+2) = 0

(x+2)(x-1) = 0

x+2 = 0 => x = -2

x -1 = 0 => x = 1