(12-3х)(х+5)/х+4=0. прямо сейчас

Question

(12-3х)(х+5)/х+4=0. прямо сейчас

Answer 1

X+4 ≠ 0
x ≠ -4

(12-3x)(x+5) = 0
12x+60-3x²-15x = 0
3x²+3x-60 = 0
D = 9+4*3*60 = 9+720 = 729 = (27)²
x1 = (-60-27)/6 = -14,5
x2 = (-60+27)/6 = -5,5

Answer 2

(12-3x)*(x*5)/x+4=0
(12-3x)*(x*5)=0
12-3x=0
x=4