a)
2x²+4x=0
2x(x+2)=0
x₁=0 lub x₂= -2
b)
16x²-25=0
(4x-5)(4x+5)=0
4x-5=0 lub 4x+5=0
x₁=⁵/₄ lub x₂= - ⁵/₄
c)
x²+2x+1=0
(x+1)² = 0
x = -1
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a)
2x²+4x=0
2x(x+2)=0
x₁=0 lub x₂= -2
b)
16x²-25=0
(4x-5)(4x+5)=0
4x-5=0 lub 4x+5=0
x₁=⁵/₄ lub x₂= - ⁵/₄
c)
x²+2x+1=0
(x+1)² = 0
x = -1