Bài 2: Nhân đa thức với đa thức
Các câu hỏi tương tự
1. (2x +3) (x- 5) +(X-4 ) + (x-5) ( x-2 0 = (3x -5) ( x-4)
2. (8x-3) (3x +2) - (4x+ 7) (x+4) = (2x + 1) (5x-1)
3. 2x^2 + (x -1) (x+1)= 5x (x+10
4. 4- ( x-1) (x+5) - (x+2) (x+5) = 3(x-1) (x+2)
1) 5(x-3) (x-7)-(5x+1) (x-2)= -8
2) x(x+1) (x+2)-(x+4) (3x-5)= 84-5x
3) (9x2-5) (x+3)-3x2(3x+9)=(x-5) (x+4)-x(x-11)
4) (x2-4x+16) (x+4)-x(x+1) (x+2)+3x2=0
5) (8x+2) (1-3x)+(6x-1) (4x-10)=-50
6) (x2+2x+4) (2-x)+x(x-3) (x+4)-x2+24=0
7) (\(\dfrac{x}{2}\)+3) (5-6x)+(12x-2) (\(\dfrac{x}{4}\)+3)=0
Bài 1 : Tính
a) ( x + 1 ) \(^2\)+ ( x - 2 ) ( x + 3 ) - 4 x
b) ( 6x\(^5\)y\(^2\)-9x\(^4\)y\(3\)+ 12x\(^3\)y\(^4\)) : 3x\(^3\)y\(2\)
Tìm x biết
a) (2x+3)(x–4)+(x–5)(x–2)=(2x+1)(x–4)
b)(8x–3)(3x+2)–(4x+7)(x+4)=(2x+1)(5x–1)
c) 2x^2+3(x–1)(x+1)=5x(x+1)
d) (8–5x)(x+2)+4(x–2)(x+1)+(x–2)(x+2)
e)4(x–1)(x+5)–(x+2)(x+5)=3(x–1)(x+2)
1) (x2-4x+16) (x+4)-x(x+1) (x+2)+3x2=0
2) (8x+2) (1-3x)+(6x-1) (4x-10)=-50
3) (x2+2x+4) (2-x)+x(x-3) (x+4)-x2+24=0
4) (\(\dfrac{x}{2}\)x2+3) (5-6x)+(12x-2) (\(\dfrac{x}{4}\)x4+3)=0
a\(8\left(x+\dfrac{1}{x}\right)^{2^{ }}+4\left(x^{2^{ }}+\dfrac{1}{x^2}\right)-4\left(x^2+\dfrac{1}{x^2}\right)\left(x+\dfrac{1}{x}\right)=\left(x+4\right)^2\)giải các phương trình\(\dfrac{x+4}{2x^2-5x+2}+\dfrac{x+1}{2x^2-7x+3}=\dfrac{2x+5}{2x^2-7x+3}\)
Rút gọn :
1, 2x(x-5)-(x-2)2-(x+3)(x-3)
2, (x+1)2-3(x-5)(x+5)-(2x-1)2
3, (x-1)3-(x-3)(x2+3x+9)
4, (x+5)(x2-5+25)-(x+2)3
5, 2x(x-7)-(x+3)(x-2)2+(x+1)2
6, (2x+5)(x-3)-(x+5)(x-1)-(x-4)2
8, (x+5)(x-5)(x+2)-(x+2)3
Tính(rút gọn)
1, x^ 2 - 2x + 5 - (x - 7)(x + 2)
2,-5x(x-5)+(x-3)(x^2-7)
3, x(x^2-x-2)-(x+5)(x-1)
4, (-x+5)(x+3)+(2x-1)(x+3)
5, -4x(x+3)(x-4)-3x(x^2-x+1)
Bài 1: Tìm a, b, c biết
3x^2(a^2-2bx-3c)=3x^4-12x^3+27x2
Bài 2:Tìm x biết
a) 4(x+2)-7(2x-1)+3(3x-4)=30
b) 2(5x-8)-3(4x-5)=4(3x-4)+11
c) 5x(1-2x)-3x(x+18)=0
d) (x+2)(x+3)-(x-2)(x+5)=0