Question

1. Tính:

a) \(\left(5x^3-x+2\right)\cdot\left(x-1\right)\)

b) \((4x+4)*(3-x^2-x^3)\)

giúp em vs ạ, em c.ơn nhìu nhìuuu

Answer 1

a) ( 5x³ - x +2 ) ( x-1 )
= 5x⁴ -5x³ - x² + 1 + 2x - 2
= 5x⁴ -5x³ - x² 2x - 1
b) ( 4x + 4 )(3 - x² - x³ )
= 12x - 8x³ - 4x⁴ + 12 - 4x² - 4x³
= -4x⁴ - 12x³ -4x² + 12x + 12

Answer 2

a) (5x³-x+2)(x-1) = 5x⁴-5x³-x²+3x-2

b) (4x+4)(3-x²-x³) = 12x-4x³-4x⁴+12-4x²-4x³ = -4x⁴ -8x³ - 4x² + 12x +12

Answer 3

1.Tính :

a) (5x³ - x+2).(x-1)

=5x⁴-5x³ -x² + x+2x-2

=5x⁴-5x³-x² +2x+x-2.

b)(4x+4).(3-x² -x³ )

=12x-4x³-4x⁴+12-4x²-4x³

=12x-8x³ -4x⁴+12-4x²

=-4x⁴-8x³-4x² +12x +12.