Question

thực hiện phép tính

a.2x(x^2-3x+4)

b.(x+2)(x-1)

c.(4x^4-2x^3+6x^2):2x

Answer 1

a,\(2x\left(x^2-3x+4\right)\)

\(=2x^3-6x+8x\)

b,\(\left(x+2\right)\left(x-1\right)\)

\(=x^2-x+2x-2\)

\(=x^2+x-2\)

c,\(\left(4x^4-2x^3+6x^2\right):2x\)

\(=2x^3-x^2+3x\)

Answer 2

a.2x( x\(^2\) - 3x +4 )
= 2x\(^3\) - 6x\(^2\) + 8x
b. ( x + 2 )( x - 1 )
= x\(^2\) - x + 2x - 2
= x\(^2\) + x - 2
c. ( 4x\(^4\) - 2x\(^3\) + 6x\(^2\) ) : 2x
= 2x\(^3\) - x\(^2\) + 3x