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3x 计算:3x(x^2-2x-1)-2x^2(x-3)
计算:3x x^2-2x-1 -2x^2 x-3 计算:3x x^2-2x-1 -2x^2 x-3 3x x^2-2x-1 -2x^2 x-3 =3x^3-6x^2-3x-2x^3+6x^2=x^3-
计算:3x(x^2-2x-1)-2x^2(x-3)
计算:3x(x^2-2x-1)-2x^2(x-3)
3x(x^2-2x-1)-2x^2(x-3)
=3x^3-6x^2-3x-2x^3+6x^2
=x^3-3x
3X(x^2-2x-1)-2x^2(x-3)=多少
3X(x^2-2x-1)-2x^2(x-3)
=3x^3-6x^2-3x-2x^3+6x^2
=x^3-3x

计算(2x-1)(3x+2)-(x-1)(x-3)
(2x-1)(3x+2)-(x-1)(x-3)
=6x^2+4x-3x-2-(x^2-3x-x+3)
=5x^2+5x-1
计算 3x(x的2次方-2x-1)-2x的2次方(x-3)
3x(x^2-2x-1)-2x^2(x-3)
=x(3x^2-6x-3)-x(2x^2-6x)
=x(3x^2-6x-3-2x^2+6x)
=x(x^2-3)
=x^3-3x
计算x-3(1-2x+x^2)+2(-2+3x+x^2),线上等,速度
=x-3+6x-3x^2-4+6x+2x^2
=13x-x^2-7
计算:x-3(1+2x-x的2次方)+2(3x-2-x的2次方)
原式=x-3-6x+3x²+6x-4-2x²
=x²+x-7
计算:(1x+2+2x?2)÷3x+2x2+2x,其中x=3
原式=
x?2+2x+4 (x+2)(x?2)?
x(x+2) 3x+2=
3x+2 (x+2)(x?2)?
x(x+2) 3x+2=
x x?2,
当x=
时,原式=
3 3?2
=-
3(
3+2)=-3-2
3.
计算:(3x 2 -2x+1)-(x 2 -x+3)
原式=3x 2 -2x+1-x 2 +x-3=2x 2 -x-2.
计算:(2x^2)^2+(-3x)^3·(-2x)
你好!
数学之美团为你解答
(2x²)² + (-3x)³·(-2x)
= 4x⁴ + (-27x³)·(-2x)
= 4x⁴ + 54x⁴
= 58x⁴
(2x-1)^2-(x+3)(x-3)计算
解
(2x-1)²-(x+3)(x-3)
=4x²-4x+1-x²+9
=3x²-4x+10
很赞哦! (1069)