\(a,\left(3x-1\right)\left(x-2\right)-\left(x-4\right)\left(x+4\right)\)
\(=3x^2-6x-x+2-x^2+16\)
\(=2x^2-7x+18\)
\(b,\left(x-1\right)\left(1-x\right)-\left(x-2\right)\left(x-3\right)\)
\(=-x^2+1-x^2+5x-6=-2x^2+5x-5\)
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
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
Tìm X :
A) x.(x-2)-(x+3).x+7+9x=6
B)(3x-5).(7-5x)-(5x+2).(2-3x)=4
C)(x+2).(x mũ2 -2x+4)-(x.3+3)=14x
D)(x mũ2 -x+1).(x+1)-x mũ3 -3x=2
GẤP MN HỘ E ...!!🙂😣
1. rút gọn
a. x2 (x + 2) - 3x (x2 - 1)
b. x3 (x-4) + (x2 + 3) (-x) - x4
2. tìm x , biết:
a. 2x (x - 5) - x (3 + 2x)= 26
b. x (x2 + x + 1 ) - x2 (x+ 1) - x + 5 = 4
Bai1: Thực hiện phép nhân:
a) 3xy(4xy^2-5x^2y-4xy)
b) (2x-1)(4x^2+2x+1)
c)(3x+2)(9x^2-6x+4)
Bài 2: Tìm x biết
a) (15x-5)(4x-1)+(3x-7)(1-16x)=81
b) (3x-2)(2x-3)-x(6x-4)=11
c) (2x^2-5)(x+1)-(2x-1)(x^2-3)-3x^2=6
d) (2x-1)(3x-1)-(2x-3)(9x-1)=0
Bài 3: a) Cho a+b+c=2P
Chứng minh rằng: 2bc+b^2+c^2-a^2=4P(P-a)
b) Cho M=(x-a)(x-b)+(x-b)(x-c)+(x-c)+(x-a)+x^2
Tính M theo a,b,c biết x=1/2a+1/2b+1/2v
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
Tìm x :
a/2x(x - 1) - x(4 - x) = 0
b/3(1 - 4x)(x - 1) + 4(3x - 2)(x + 3)=-27
tìm x
1}x+3[x-1]=4 2}2[x-3]+5=3
3}x[x-2]-x^2=-2 4}x^2-x[x+2]=6 5}3x[x-5]-3x[x-3]=6
6}3[x^2-2x+1]+x[2-3x]=7
Bài 1 Thực hiện phép tính
a) (x-1)(x-2)(x-3)
b) (x^2 +x+1)(x^2-1)(x^2-x+1)
c) (2x-5)(4-3x)-(3x+11)(5-2x)-15(2x-5)
d)(x^2-2x+3)(3x-5)-(x^2+x-1)(2x+7)
mk dag can gấp nhá nhanh lên cảm ơn
