5x (3x-1) + x(3x-1) - 2 (3x-1) =0
➜ \(\left(5x+x-2\right)\left(3x-1\right)=0\)
➞\(\left[{}\begin{matrix}5x+x-2=0\\3x-1=0\end{matrix}\right.\Rightarrow\left[{}x=\frac{1}{3}}}\)
tìm x
a) ( 3x-1)(2x+7)-(x+1)(6x-5)=16
b) (10x+9)x-(5x-1)(2x+3)=8
c) x.(x+1)(x+6)-x3=5x
d) (3x-5)(7-5x)+(5x+2)(3x-2)-2=0
Tìm x
a ) ( 2x-2)^2 - (3x-2)^2 = 0
b) ( 5x - 4)^2 - 1 = 0
c) x(3-x)(x+3)-(3-x)(9+3x+^2)= -27
d) 3x^2 +5x - 8 = 0
Bài1: Thực hiện phép tính
a) 2x(3x2 – 5x + 3) b) - 2x ( x2 + 5x+3)
Bài 4: Tìm x, biết.
a/ 3x + 2(5 – x) = 0 b/ x(2x – 1)(x + 5) – (2x2 + 1)(x + 4,5) = 3,5
c/ 3x2 – 3x(x – 2) = 36.
II. PHÂN TÍCH ĐA THỨC THÀNH NHÂN TỬ
Bài1: Phân tích đa thức thành nhân tử.
a/ 14x2y – 21xy2 + 28x2y2 b/ x(x + y) – 5x – 5y.
c/ 10x(x – y) – 8(y – x). d/ (3x + 1)2 – (x + 1)2
e/ 5x2 – 10xy + 5y2 – 20z2. f/ x2 + 7x – 8
g/ x3 – x + 3x2y + 3xy2 + y3 – y h/ x2 + 4x + 3.
1. Thu gọn:
a) 5x. (x-3) - x. (5x+1)
b) -3x. (x-1) - x. (x+1) + 4x. (x-2)
c) (3x-1). (x-2) + (x-1). (x+1)
d) (4x-3). (2x-5) - (8x-2). (x-1)
2. Tìm x:
a) 3x. (x-3) - x. (3x-2) = 2
b) -2x. (x+1) - 3. (1-x) + 2x2
c) (x-2). (x+2) + (3.x). (x+1) = 0
d) (2x-1). (x+3)- (x-2). (2x+1) = 10
Tìm x
Bài 1
1.(x-3)(x+2)-x(x-7)=15
2.(x-5)(x+5)+x(3-x)=20
3.(x-7)2-x(2+x)=-7
4.(x-4)2-(x+4)(x-4)=-16
5.(x-5)(x+5)-x(2-3x)=4x2-7
Bai2
1.2x(x-2)+3x-6=0
2.3x(x-5)-5x+25=0
3.x(x+7)-x-7=0
4.(5x-20)+3x2-12x=0
5.(1-x)-3x2+3x=0
Tìm x, biết
a) ( x^2 -1/2.x ) :2x + ( 3x - 1 )^2 : ( 1-3x) =0
b) ( x-1)^3 + 1 + 3x( x - 4) = 0
Tìm x,biết:
a) 3(2x-1) -5(x-3) +6(3x-4) = 24
b) 2x2 + 3(x2 -1) = 5x (x+1)
c) 2x(5-3x) + 2x(3x-5) -3(x-7) = 3
d) 3x(x+1) -2x(x+2) = -1-x
e) 3x(x-2) -x(1+3x) = 14
f) 2x(x+3) -3(x2 + 1) = x+1 -x(x-2)
giúp mik nha !!!! :D
1. Tìm x ,biết
a)(3x-1) .(2x+7)-(x+1) .(6x-5)=16
b)(10x+9) .x -(5x-1) .(2x+3)=8
c)(3x-5) .(7-5x) +(5x+2) .(3x-2)-2=0
d)x.(x+1) .(x+6)-x^3=5x
Các bạn giúp mk bài này với (mk đang cần gấp , dấu chấm là dấu nhân nhé .thank you)
Đề: Tìm x
a)2x.(3x+5)-x.(6x-1)=33 k)5(x+3)-2x(x+3)=0
b)x(3x-1)+12x-4=0 i)5x(x-2)-(2-x)=0
c)5x(2x+1)-12x-6=0 m)x(x-1)-2(1-x)=0
d)x3-5x2+4x-20=0
e)2x3-5x2+2x-5=0
g)(x-2)3-x(x+1).(x-1)+62=5
