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5x³-4x²-10x+8=0
14x³+14x²-8x-8=0
x²(5x-4)-2(5x-4)=0
(x²-2)(5x-4)=0
(x+√2)(x-√2)(5x-4)=0
x=-√2 ∨ x=√2 ∨ 5x=4
x=⅘
14x²(x+1)-8(x+1)=0
(14x²-8)(x+1)=0
(√14x+2√2)(√14x-2√2) (x+1)=0
√14x=-2√2 ∨√14x=2√2∨x=-1
x=-2√2/√14 ∨x=2√2/√14 ∨ x=-1
x=- 2√7/7 ∨ x= 2√7/7 ∨ x=-1
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5x³-4x²-10x+8=0
x²(5x-4)-2(5x-4)=0
(x²-2)(5x-4)=0
(x+√2)(x-√2)(5x-4)=0
x=-√2 ∨ x=√2 ∨ 5x=4
x=⅘
14x³+14x²-8x-8=0
14x²(x+1)-8(x+1)=0
(14x²-8)(x+1)=0
(√14x+2√2)(√14x-2√2) (x+1)=0
√14x=-2√2 ∨√14x=2√2∨x=-1
x=-2√2/√14 ∨x=2√2/√14 ∨ x=-1
x=- 2√7/7 ∨ x= 2√7/7 ∨ x=-1