Peshite ypaBnenie x+6*(x-18)

Question

Peshite ypaBnenie x+6*(x-18)

Answer 1

X+6·(x-18)=0
x²-18x+6x-108=0
x²-12x-108=0
D=12²-4·1·(-108)=144+432=576
√D=24
x₁=
x₂=