1)x^2+2x-3=0
(x+3)(x-1) = 0
x₁ = -3, x₂=1
2)x^2-8x+16=0
(x-4)² = 0
x = 4
3)x^2-4x+3=0
(x-1)(x-3) = 0
x₁ = 1, x₂=3
4)x^2-2x+1=0
(x-1)² = 0
x = 1
5)x^2+4x-5=0
(x-1)(x+5) = 0
x₁ = 1, x₂= -5
1)x^2+2x-3=0
(x+3)(x-1) = 0
x₁ = -3, x₂=1
2)x^2-8x+16=0
(x-4)² = 0
x = 4
3)x^2-4x+3=0
(x-1)(x-3) = 0
x₁ = 1, x₂=3
4)x^2-2x+1=0
(x-1)² = 0
x = 1
5)x^2+4x-5=0
(x-1)(x+5) = 0
x₁ = 1, x₂= -5