Răspuns :
x²-3x=0, x(x-3)=0, x1=0, x2=3 S= 0, 3
x²-16=0, (x-4)(x+4)=0, x1=4, x2=-4 S= -4, 4
x²=25, (x-5)(x+5)=0, x1=5,x2=-5 S=-5, 5
6x²+x-2=0, Δ=49, x1=(-1+7)/2*6=1/2, x2=-2/3 S=-2/3, 1/2
S-multimea solutiilor ecuatiei
x²-16=0, (x-4)(x+4)=0, x1=4, x2=-4 S= -4, 4
x²=25, (x-5)(x+5)=0, x1=5,x2=-5 S=-5, 5
6x²+x-2=0, Δ=49, x1=(-1+7)/2*6=1/2, x2=-2/3 S=-2/3, 1/2
S-multimea solutiilor ecuatiei