Question

Rezolvati ecuație x2-10x+16=0

Answer 1

x^2-10x+16=0
d. = b^2 - 4ac = 100 - 4x16= 36

x1 = 10 + 6 / 2 = 16/2 = 8
x2 = 10 - 6 / 2 = 4/2 = 2

S ={2;8}

Answer 2

x²-10x+16=0
a=1
b= -10
c=16
Δ=b²-4ac= (-10)²-4*1*16=100-64
Δ=36
x₁= (-b+√Δ)/2a=(10+√36)/2*1=(10+6)/2=16/2=8
x₂= (-b-√Δ)/2a= (10-√36)/2*1=(10-6)/2=4/2=2

Solutiile ecuatiei sunt 2 si 8.
S={2,8} 
x∈{2,8}