Question

Rezolvati ecuatiile :

a) 9(x-2) + 14 = -2(3-4x) + 1

b) x ·√(-1)² + x·(√-2)² + x·( √-3)² = 6

c) (1²-x) + (2²-x) + (3³-x) = 50

Answer 1

a) 9(x-2) + 14 = -2(3-4x) + 1
9x-18 + 14 = -6+8x + 1
9x-4 = +8x-5
x=-1

b) x ·√(-1)² + x·(√-2)² + x·( √-3)² = 6
x ·1 + x·2 + x·3 = 6
x+2x+3x=6
6x=6
x=1

c) (1²-x) + (2²-x) + (3³-x) = 50
1-x + 4-x + 27-x = 50
32-3x=50
3x=-18
x=-18/3
x=-6