Violympic toán 8
kìCác câu hỏi tương tự
a) -3x(x+2)²+(x+3)(x-1)(x+1)-(2x-5)²
b) 2(x-3)(x+3)(x+2)-(x-1)(x²-3)-5x(x+4)²-(x-5)²
c) 2x (x - 4)²(x + 5)(x - 2)(x + 2)+2(x + 5)² - (x - 1)²
d) (x + 5)² - 4 x (2 x + 3)²(2 x - 1)(x + 3)(x- 3)
e) -2 x( 3 x + 2)(3 x -2)+ 5( x + 2)²- (x -1) (2 x - 1)(2x +1)
f) (7 x - 8)(7 x + 8) - 10(2x + 3)² + 5 x (3x - 2)² - 4 (x - 5)².
g) (x²- 3)(x² + 3)- 5x²(x + 1) -(x² - 3x) (x² - 2x) + 4x(x + 2)².
23 tháng 3 2020 lúc 13:57
Giải phương trình:
1. (x - 5)2 + (x + 3)2 = 2(x - 4)(x + 4) - 5x + 7
2. (x + 3)(x - 2) - 2(x + 1)2 = (x - 3)2 - 2x2 + 4x
3. (x + 1)3 - (x + 2)(x - 4) = (x - 2)(x2 + 2x + 4) + 2x2
4. (x - 2)3 + (x - 5)(x + 5) = x(x2 - 5x) - 7x + 3
5. (x + 4)(x2 - 4x + 16) - x(x - 4)2 = 8(x - 3)(x + 3)
23 tháng 3 2020 lúc 14:07
Giải phương trình:
1) (x - 5)2 + (x + 3)2 2(x - 4)(x + 4) - 5x + 7
2) (x + 3)(x - 2) - 2(x + 1)2 (x - 3)2 - 2x2 + 4x
3) (x + 1)3 - (x + 2)(x - 4) (x - 2)(x2 + 2x + 4) + 2x2
4) (x - 2)3 + (x - 5)(x + 5) x(x2 - 5x) - 7x + 3
5) (x + 4)(x2 - 4x + 16) - x(x - 4)2 8(x - 3)(x + 3)
6) 4(x - 1)(x + 2) - 5(x + 7) (2x + 3)2 - 5x + 3
7) (x - 1)(x2 + x + 1) + 3(x - 2)2 x(x2 + 3x - 1)
8) (x + 5)(x - 5) - (x + 3)(x2 - 3x + 9) 5 - x(x2 - x -2)
9) (x + 2)2 - 2(x + 3)(x - 4) 5 - x(x - 3)
10)...
Đọc tiếp
Giải phương trình:
1) (x - 5)2 + (x + 3)2 = 2(x - 4)(x + 4) - 5x + 7
2) (x + 3)(x - 2) - 2(x + 1)2 = (x - 3)2 - 2x2 + 4x
3) (x + 1)3 - (x + 2)(x - 4) = (x - 2)(x2 + 2x + 4) + 2x2
4) (x - 2)3 + (x - 5)(x + 5) = x(x2 - 5x) - 7x + 3
5) (x + 4)(x2 - 4x + 16) - x(x - 4)2 = 8(x - 3)(x + 3)
6) 4(x - 1)(x + 2) - 5(x + 7) = (2x + 3)2 - 5x + 3
7) (x - 1)(x2 + x + 1) + 3(x - 2)2 = x(x2 + 3x - 1)
8) (x + 5)(x - 5) - (x + 3)(x2 - 3x + 9) = 5 - x(x2 - x -2)
9) (x + 2)2 - 2(x + 3)(x - 4) = 5 - x(x - 3)
10) (x + 7)(x - 7) - (x + 2)2 = 5(x - 2) + (x - 7)
_Làm hộ với!_
Tìm \(x\in N\)sao cho: (2^x-8)^3+(4^x+13)^3=(4^x+2^x+5)^3
1 tháng 12 2018 lúc 14:12
Tìm x biết:
1. (x-2)^2-(x-3)(x+3)=6
2. 4(x-3)^2-(2x-1)(2x+1)=10
3. (x-4)^2-(x-2)(x+2)=6
4.9(x+1)^2-(3x-2)(3x+2)=10
5. 3x +2(5-x)=0
6.x(2x-1)(x+5)-(2x^2+1)(x+4,5)=3,5
7, 3x^2-3x(x-2)=36
8. (3x^2-x+1)(x-1) +x^2(4-3x)=5/2
1. x2-8x+16
2.(x+5)(x-5)
3.x3-6x2+12x-8
4.(x+2)(x2-2x+4)
5.x2+2x+1
6.x2-1
Thực hiện phép tính: 1) 4x3y2 : x2 2) (3x2 - 6x) : (2 - x). 3) (x3 - 8) : (x2 + 2x + 4) 4) (3x2 - 6x):(2-x) 5) (x3 + 2x2-2x-1):(x2+3+1) 6) [5(x-y)4-3(x-y)3+4(x-y)2]:(x-y)2 7) [(x-y)5-2(x+y)4+3(x+3)3]:(x+y)3 8) (x2-2xy+y2):(x-y) 9) (27x3+1):(9x2-3x+1)
Đọc tiếp
Thực hiện phép tính: 1) 4x3y2 : x2 2) (3x2 - 6x) : (2 - x). 3) (x3 - 8) : (x2 + 2x + 4) 4) (3x2 - 6x):(2-x) 5) (x3 + 2x2-2x-1):(x2+3+1) 6) [5(x-y)4-3(x-y)3+4(x-y)2]:(x-y)2 7) [(x-y)5-2(x+y)4+3(x+3)3]:(x+y)3 8) (x2-2xy+y2):(x-y) 9) (27x3+1):(9x2-3x+1)
Giải phương trình sau :
\(\dfrac{1}{(x+3)(x+2)}+\dfrac{1}{(x+4)(x+3)}+\dfrac{1}{(x+5)(x+4)}+ \dfrac{1}{(x+6)(x+5)}=\dfrac{1}{8}\)
Giải phương trình sau:
1, |x-7|=x-7
2, |x+1|+|2x-3|=|3x-2|
3, |x+5|-|1-2x|=x
4, \(\left|x^3-x-8\right|=x^3+x+8\)