Bài 2: Nhân đa thức với đa thức
Các câu hỏi tương tự
Bài 3: Áp dụng đẳng thức trên thực hiện phép nhân bằng cách cho a, b là một số cho trước. ( mỗi ý 10 câu, rồi tính...) Hãy tính:
1) ( x+3)( x+ 5) =
2) (x+6)(x+2)
3) (x+3)(x+7)
4) ( x- 3)( x-5)
5) (x-4)(x-9)
6) (x-10)(x-12)
7) (x+3)(x-5)
8) (x_8)(x+3)
9) (x+8)(x-4) 10) ( 2x-1)( 3x-2)
11)(3x+1)( 5x-3)
Bài 1 : Tìm x, biết
a) 3x(x2 - 2) + x2(1-2x) - x2 = -12
b) 3x(2x +3) - (2x +5)(3x -2) = 8
c)3(3x -1)(2x+5) - 6(2x -1)(x+2) = -6
d) 3(2x -1)(3x - 1)- (2x -3)(9x -1) - 3 = -3
e) 4x(x-1)- 3(x2 -5)- x2 = (x-3)(x+4)
f) (3x-1)(2x+7)-(x+1)(6x-5)= (x+2)-(x-5)
\(\left(\dfrac{x}{2}+3\right).\left(5-6\text{x}\right)+\left(12\text{x}-2\right).\left(\dfrac{x}{4}+3\right)=0\)
Tìm x
1) (\(\dfrac{1}{2}\)x + 3)*(x2- 4x- 6)
2) (6x2 -9x +15)*(\(\dfrac{2}{3}\)x+1)
3) (3x2 -x+5)*(x3+5x-1)
4) (x-1)*(x+1)*(x-2)
5) D=(x-7)*(x+5)-(x-4)*(x+3)
6) E= 4x*(x2-x-1)-(x+3)*(x2-2)
7) F= 5x*(x-3)*(x-1)-4x*(x2-2x)
Bài 1:Tìm x, biết
a) 4x(x-1)-3(x2-5)-x2=(x-3)-(x+4)
b) 2(3x-1)(2x+5-6)(2x-1)(x+2)=6
c) 3(2x-1)(3x-1)-(2x-3)(9x-1)-3=-3
Bài 1: Thực hiện phép tính
a) (3x-1)(9x2+3x+1)-4x(x-5)
b) (7x+2)(3-4x)-(x+3)(x2-3x+9)
c) (4x+3)(4x-3)-(2-x)(4+2x+x2)
d) (3x-8)(-5x+6)-(4x+1)(3x-2)
e) (3x-6)4x-2x(3x+5)-4x2
f) (5x-6)(6x-5)-x(3x+10)
Bài 2 : Tính
a) x(x+3)-x2=6
b) 2x(x-5)+x(-2x-1)=6
c) x (x+5)-(x+1)(x-2)=7
d)(3x+4)(6x-3)-(2x+1)(9x-2)=10
BT:
1Tim x
a)(x+2)(x+3)-(x-2)(x+5)=6
b)3(1-4x)(x-1)+4(3x-2)(x+3)=-27
c)5(2x+3)(y+2)-2(5y-4)(y-1)=75
d)(3x+2)(2x+9)-(x+2)(6x+1)=(x+1)-(x-6)
Bài 1.Tìm x biết
a,(x+8)(x+6)=104+x^2
b,(x+1)(x+2)-(x-3)(x+4)=6
c,4x(x-5)-(x-1)(4x-3)=5
d,(3x-4)(x-2)=3x(x-9)-3
e,(x-5)(x-4)-(+1)(x-2)=7
f,5x(x-3)=(x-2)(5x-1)-5
giải phương trình :
a) \(\dfrac{x+2}{x+1}+\dfrac{3}{x-2}=\dfrac{3}{x^2-x-2}+1\)
b)\(\dfrac{x+6}{x-5}+\dfrac{x-5}{x+6}=\dfrac{2x^2+23x+61}{x^2+x-30}\)
Tìm x:
1. 3x (2x + 3) - (2x + 5).(3x - 2) 8
2. 4x (x -1) - 3(x2 - 5) -x2 (x - 3) - (x + 4)
3. 2 (3x -1) (2x +5) - 6 (2x - 1) (x + 2) -6
4. 3 ( 2x - 1) (3x - 1) - (2x - 3) (9x - 1) - 3 -3
5. (3x - 1) (2x + 7) - ( x + 1) (6x - 5) (x + 2) - (x - 5)
6. 3xy (x + y) - (x + y) (x2 + y2 + 2xy) + y3 27
7. 3x (8x - 4) - 6x (4x - 3) 30
8. 3x (5 - 2x) + 2x (3x - 5) 20
HELP ME T^T
Đọc tiếp
Tìm x:
1. 3x (2x + 3) - (2x + 5).(3x - 2) = 8
2. 4x (x -1) - 3(x2 - 5) -x2 = (x - 3) - (x + 4)
3. 2 (3x -1) (2x +5) - 6 (2x - 1) (x + 2) = -6
4. 3 ( 2x - 1) (3x - 1) - (2x - 3) (9x - 1) - 3 = -3
5. (3x - 1) (2x + 7) - ( x + 1) (6x - 5) = (x + 2) - (x - 5)
6. 3xy (x + y) - (x + y) (x2 + y2 + 2xy) + y3 = 27
7. 3x (8x - 4) - 6x (4x - 3) = 30
8. 3x (5 - 2x) + 2x (3x - 5) = 20
HELP ME T^T