Toán Lớp 8: Thực hiện phép tính:
(x-3)(6x^3-4x)
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Toán Lớp 8: Thực hiện phép tính:
(x-3)(6x^3-4x)
Comments ( 2 )
(x-3)(6x^3-4x)
=6x^4-4x^2-18x^3+12x
=6x^4-18x^3-4x^2+12x
#owen
$\left(x-3\right)\left(6x^3-4x\right)$
$=x\cdot \:6x^3+x\left(-4x\right)-3\cdot \:6x^3-3\left(-4x\right)$
$=6x^4-4x^2-18x^3+12x$