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Violympic toán 8
Các câu hỏi tương tự
Tìm x biết : 6(x+2)(x-3)-3(x-2)^2-3(x-1)(x+1)=1
3(x+2)^2+(2x-1)^2-7(x+3)(x-3)=36
(x-1)(x^2+x+1)+x(x+2)(2-x)=5
(x-1)^3-(x+3)(x^2-3x+9)+3(x^2-4)=2
Tìm x biết : 6(x+2)(x-3)-3(x-2)^2-3(x-1)(x+1)=1
3(x+2)^2+(2x-1)^2-7(x+3)(x-3)=36
(x-1)(x^2+x+1)+x(x+2)(2-x)=5
(x-1)^3-(x+3)(x^2-3x+9)+3(x^2-4)=2
Tìm x
a)(2x+1)2-4(x+2)2 =9
b)(3x-1)2 +2(x+3)2 +11(x+1)(1-x)=6
c)(x+1)3 - x2 (x+3)=2
d)(x-2)3 -x(x+1)(x-1)+6x2 =5
e)(x-3)(x2 +3x +9)-x(x+4)(x-4)=5
g)(x-2)3 -(x+5)(x2 -5x+25)+6x2 =11
Tìm x, biết:
a, (2x + 1) - 4(x + 2)^2 9
b, 3(x - 1)^2 - 3x(x - 5) 21
c, (x + 3)^2 - (x - 4)(x + 8) 1
d, 3(x + 2)^2 + (2x - 1)^2- 7(x + 3)(x - 3) 36
e, (x - 1)( x^2+ x + 1) - x(x + 2)(x - 2) 5
f, (x - 1)^3- (x + 3)(x^2-3x + 9) + 3(x^2 - 4) 2
Đọc tiếp
Tìm x, biết:
a, (2x + 1) - 4(x + 2)\(^2\) = 9
b, 3(x - 1)\(^2\) - 3x(x - 5) = 21
c, (x + 3)\(^2\) - (x - 4)(x + 8) = 1
d, 3(x + 2)\(^2\) + (2x - 1)\(^2\)- 7(x + 3)(x - 3) = 36
e, (x - 1)( x\(^2\)+ x + 1) - x(x + 2)(x - 2) = 5
f, (x - 1)\(^3\)- (x + 3)(x\(^2\)-3x + 9) + 3(x\(^2\) - 4) = 2
Tìm x
a)(2x+1)2-4(x+2)2 =9
b)(3x-1)2 +2(x+3)2 +11(x+1)(1-x)=6
c)(x+1)3 - x2 (x+3)=2
d)(x-2)3 -x(x+1)(x-1)+6x2 =5
e)(x-3)(x2 +3x +9)-x(x+4)(x-4)=5
g)(x-2)3 -(x+5)(x2 -5x+25)+6x2 =11
a) x-1/x+1/x+1=2x-1/x^2+x
b) 5/x-3-2x-3/x+3=2x(1-x)/x^2-9
1. Tìm x
a. (5x-7)(x-9)-(-x+3)(-5x+2)= 2x(x-4)-(x-1)(2x+3)
b. (x-3)(-x+10)+(x-8)(x+3)= (5x^2-1)(x+3)-5x^3-15x^2
Rút gọn cac biểu thức sau :
A-(x-3).(x-7)-x(x+6)+16x-3
B= (x-3) 2-2(x2-9)+(3+x)2
C=2(x-1)2-(x+2)(x-3)-(x+3)(x-3)-7
Bài 1: giải các phương trình sau
a,(3x-1)(x+3)=(2-x)(5-3x) d,(3x+5)(2x+1)=(6x-2)(x-3)
b,(x+5)(2x-1)=(2x-3)(x+1) e,(x+2)2+2(x-4)=(x-4)(x-2)
c,(x+1)(x+9)=(x+3)(x+5) f,(x+1)(2x-3)-3(x-2)=2(x-1)2