Решите уравнения (5 х+1) = (3 х-9) ; (4 х-12) = 4; (3 х-5) * (2 х+1) = 0

(5 х+1) = (3 х-9)

5x-3x=-9-1

2x=-10 x=-5

(4 х-12) = 4

4x=4+12=16

x=16:4=4

(3 х-5) * (2 х+1) = 0

6x ²+3x-10x-5=0

6x²-7x-5=0

D=49-4*6 * (-5) = 49+120=169 √169=13

x (1) = (7+13) : 2*6=20/12=10/6=1 4/6 = 1 2/3 ≈1.66

x (2) = (7-13) : 12=-6/12=-1/2=-0.5