\(x^2\left(11x-2\right)+x^2\left(x-1\right)-3x\left(4x^2-x-1\right)\)
\(=11x^3-2x^2+x^3-x^2-12x^3+3x^2+3x\)
\(=3x\)
\(x^2\left(11x-2\right)+x^2\left(x-1\right)-3x\left(4x^2-x-1\right)\)
\(=11x^3-2x^2+x^3-x^2-12x^3+3x^2+3x\)
\(=3x\)
Bài 1: Rút gọn
B= x^2.(11x-2) + x^2.(x-1) - 3x.(4x^2 - x - 2)
BT:
a)3y2.(2y-1)+y-y.(1-y+y2)-y2+y
b)25x-4.(3x-1)+(5-2x).7
c)11x-2.(10x-1)-(4x-1).(-2)
d)(1/2x)3-x.(1-2x-1/8x2)-x.(x+1/2)
e)12.(2-3x)+35x-(x+1).(-5)
Tìm x:
1) 4x.(x+1)-3x.(x+2)=0
2) x.(4x-2)-3x.(x-1)=x+1
a, 5*(4x-1)+2*(1-3x)-6*(x+5)=10
b, 2x*(x+1)+3*(x-1)*(x+1)-5x*(x+1)+6x mũ 2 = 0
c, 4*(x-1)*(x+5)-(x+2)*(x+5)-3(x-1)*(x+2)=0
d,2*(5x-8)-3*(4x-5)=4*(3x-4)+11
Rút gọn rồi tính giá trị các biểu thức sau:
a. 4x(3x-2)-3x(4x+1) với x=-2
b. (x+3)(x-3)-(x-1)^2 với x=6
Thực hiện phép tính :
a)5x2 - 3x . (x-2)
b) 3x.(x-5)-5x.(x+7)
c) 5x.(1/5x-2)=3.(6-1/3x2)
d) 7x.(x-5)+3.(x-2)
e) 5-4x.(x-2)+4x2
f)4x.(2x-3)-5x.(x-2)
a. 3[x^2 - 2x +1]+x[2-3x]=7
b. 5[x-2] +2[x+3]=10
c. [x+1][-3]+5[x-4]=-3
d. 2[x-1]-x[3-x]=x^2
đ. 3x[x+5]-2[x+5]=3x^2
e. 4x[x+2]+x[4-x]=3x^2 +12
f. 1/3x [3x+6]-x[x-5]=9
tìm x biết
1/ (x+1)(-3)+5(x-4)=-3
2/ 3(5x-1) -x (x+1)+x^2=14
3/ 2(x-1)-x(3-x)=x^2
4/ 3x(x+5)-2(x+5)=3x^2
5/ 4x(x+2)+x(4-x)=3x^2+12
2x (3x3-x) - 4x2( x - x2+1 ) + ( x - 3x2 ) x