2x -1 )x⁴ - 8x³ + 6x² -12x + 4 (
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Step-by-step explanation:
(2x-1)(x^4-8x^3+6x^2-12x+4)
=2x(x^4-8x^3+6x^2-12x+4)-1(x^4-8x^3+6x^2-12x+4)
=2x^5-8x^4+12x^3-24x^2+8x-x^4+8x^3-6x^2+12x-4=2x^5-8x^4-x^4+12x^3+8x^3-24x^2-6x^2+8x+12-4
=2x^5-9x^4+20x^3-30x^2+8x+8
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