Question

URGENT
11× la a doua+×-12=0
X la a doua -10x+10=0

Answer 1

11x²+x-12=0
Δ=1+528
Δ=529
√Δ=23
x₁=[(-1)-23]/22=(-24)/22=(-12)/11
x₂=[(-1)+23]/22=22/22=1

x²-10x+10=0
Δ=100-40
Δ=60
√Δ=√60=2√15
x₁=(10-2√15)/2=5-√15
x₂=(10+2√15)/2=5+√15

Answer 2

11x²+x-12=0
Δ=1²-4*11*(-12)=1+528=529
x1,2=(-11+-√529)/2*11=(-11+-23)/22
x1=(-11+23)/22=12/22=0,54
x2=(-11-23)/22=-34/22=-1,54

x²-10x+10=0
Δ=(-10)²-4*1*10=100-40=60
x1,2=(-(-10)+-√60)/2*1=(10+-2√15)/2=2(5+-√15)/2=5+-√15
x1=5+√15
x2=5-√15