factorise 8-4x-2x³+x⁴
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⭐⭐⭐ x⁴ - 2x³ - 4x + 8
→ x³ ( x - 2 ) - 4 ( x - 2 )
→ ( x - 2 ) - ( x³ - 4 )
→ [ x - 2 = 0 ]
→ [ x = 2 ]
and
→ [ x³ - 4 = 0 ]
→ [ x³ = 4 ]
:. x = 3√4
------OR---------
:. x = 3√2
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