Rozwiąż równanie:
2x³+5x²-4x-10=0
x²(2x+5)-4(2x+5)=0
(x-2)(x+2)(2x+5)=0
x=2 lub x=-2 lub x=-2,5
x²(2x+5)-2(2x+5)=0
(2x+5)(x²-2)=0
(2x+5)(x-√2)(x+√2)=0
x=2½ ∨ x=√2 ∨ x=-√2
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2x³+5x²-4x-10=0
x²(2x+5)-4(2x+5)=0
(x-2)(x+2)(2x+5)=0
x=2 lub x=-2 lub x=-2,5
2x³+5x²-4x-10=0
x²(2x+5)-2(2x+5)=0
(2x+5)(x²-2)=0
(2x+5)(x-√2)(x+√2)=0
x=2½ ∨ x=√2 ∨ x=-√2