Tìm x biết
1.(x+3)2-(x+2).(x-2)=4x+17
2.(2x+1)2-(4x-1).(x-3)-15=0
3.(2x+3).(x-1)+(2x-3).(1-x)=0
4.2(5x-8)-3(4x-5)=4(3x-4)+11
5.(3x-1).(2x-7)-(1-3x).(6x-5)=0
Rút gọn các biểu thức sau:
a) 2x(2x-1)^2-3x(x+3)-4x(x+1)
b)(3x+1) (3^2+1) (3^4+1).....(3^100+1)
c) 5x(x^2-x)-x^2(5x-5) -15
d) (x+5)^2 - 4x(2x+3)^2 - (2x-1) (x+3) (x-3)
Tìm x, biết :
a) 5x . (x - 3)2 - 5 . (x - 1)3 +15 . (x + 2) . (x - 2) = 5
b) (x + 3)3 - x . (3x + 1)2 + (2x +1) . (4x2 - 2x +1 ) - 3x2 = 42
Tìm x, biết :
a) 5x . (x - 3)2 - 5 . (x - 1)3 +15 . (x + 2) . (x - 2) = 5
b) (x + 3)3 - x . (3x + 1)2 + (2x +1) . (4x2 - 2x +1 ) - 3x2 = 42
Tìm x, biết :
a) 5x . (x - 3)2 - 5 . (x - 1)3 +15 . (x + 2) . (x - 2) = 5
b) (x + 3)3 - x . (3x + 1)2 + (2x +1) . (4x2 - 2x +1 ) - 3x2 = 42
Tìm x, biết :
a) 5x . (x - 3)2 - 5 . (x - 1)3 +15 . (x + 2) . (x - 2) = 5
b) (x + 3)3 - x . (3x + 1)2 + (2x +1) . (4x2 - 2x +1 ) - 3x2 = 42
Phân tích các đa thức sau thành nhân tử.
1) a^2+ab+2b-4 2) x^3-x 3) x^2-6x+8 4) ab+b^2-3a-3b 5) x^3-4x^2-8x+8
6)9x^2+6x-8 7)x^2-y^2-4x+4 8)5x^3-10x^2+5x 9) 3x^2-8x+4 10) 4x^2-4x-3
11) x^2-7x+12 12)x^2-5x-14 13) 3x^2-7x+2 14) a.(x^2+1)-x.(a^2-1) 15) x^4+4
16) (x+2).(x+3).(x+4).(x+5)-24 17) (a+1).(a+3).(a+5).(a+7)+15
Tìm x biết
1. 2(5x-8)-3(4x-5)=4(3x-4)+11
2. (2x+1)2-(4x-1).(x-3)-15=0
3. (3x-1).(2x-7)-(1-3x).(6x-5)=0
Bai 1: Giai phuong trinh
a, (x - 2)3 - (x - 3) (x2 + 3x + 9) +6 ( x + 1)2 = 15
b, (5x + 1)2 - (5x + 3) (5x - 3) = 30
c, (x + 3) (x2 - 3x + 9) - x (x - 2) (x+ 2 ) = 15
GIUP MINH VOI ! THANK YOU !^^