Question

数学分解因式高手来

(1). (-2x)²·(-½xy²)³·4y
(2). -2m(m²-m+1)
(3). 2／3√27·x+6√⅓·x-√3·x
(4). (a-4b)(4a+b)

Answer 1

(1). (-2x)²·(-½xy²)³·4y=(4x²)*(-x^3y^6/8)*(4y)=-2*x^5*y^7
(2). -2m(m²-m+1)=-2*m^3+2*m^2-2*m
(3). (2/3)√27·x+6√⅓·x-√3·x=(2/3)*3√3·x+6.x/(√3)-√3·x=2*x*√3+2*x*(√3)-x*√3=3*x*(√3)
(4). (a-4b)(4a+b)=4a^2-16ab+ab-4b^2=4a^2-15ab-4b^2

Answer 2

(1). (-2x)²·(-½xy²)³·4y=4X^2*-1/8X^3Y^6*4Y=-2x^5y^7
(2). -2m(m²-m+1)=-2m^3+2m^2-2m
(3). 2／3√27·x+6√⅓·x-√3·x=2√3·x+2√3·x-√3·x=3√3·x
(4). (a-4b)(4a+b)=4a^2-15ab-4b^2

Answer 3

拆开就行了啊

Answer 4

(2). 原式=负2m(m^2-m+1-m+m)
=－2m((m-1)^2+m)