Х²-4(х-2) 3х-14=0 помагите

Question

Х²-4(х-2) 3х-14=0 помагите

Answer 1

X2-12x2+24-14=0
-10x2+10=0
10x2-10=0
10(x2-1)=0
x2-1=0
x=1
x=-1

Answer 2

Х2 - 4х+8*3х-14=0
х2-4х+12х-14=0
х2+8х-14=0
D= 110