Tim x,y,z biet ;
a, |x| + (-2) 2 = 32 + \(\dfrac{1}{2}\)3
GIUP MINH VOI BAI NAY KHO QUA ! THANK YOU
2) tim x biet
a) (3x-5)2-(x+1)2=0
b) (5x-4)2-49x2=0
c) 4x3-36x=0
d) (2x+3) (r-1)+(2x-3) (1-x)=0 giai gium minh
Cho A= 3(2x-3)(3x+2)-(2x+4)(4x-3)+9x(4-x). Tim gia tri cua x de A=0
Bai 1: Cho x+y= 5 , xy= 6. Khong tinh x,y hay tinh
a, \(\dfrac{1}{x}+\dfrac{1}{y}\)
b, x2 + y2
c, x-y
Giup minh vs bai nay kho qua, Thanks nhieu !^_^
a)(2-x)(1 2x) (1 x) - (x^4 x^3-5x^2-5)
b) (x^2-7) (x+2) - (2x-1)(x-14)+ x(x^2-2x-22) + 35
a) (x^2+2x+1)(x+1)
b) (x^3-x^2+2x-1)(5-x)
c) (x-5)(x^3-x^2+2x-1)
Rút gọn biểu thức sau:
a. A= ( 5- x ). (x + 5) - 2.( x - 1). ( x - 3) - 3.( x - 2)2
b. B= ( 3 - 2x).( x - 2) + ( 2x - 5)2 - ( x - 4)
c. C= ( x - 4). ( x - 2) - 3.( x - 2) . ( 3 - 2x) - ( 2x + 1)2
d D= 2.( x - 1)2 - 3.( x - 1). ( x + 2) - ( 2x + 1)2
tim gia tri nho nhat cua
A= (x-1).(x+2).(x+3).(x+6)
tim gia tri lon nhat cua:
B=(1-\(x^n\)).(1+\(x^4\))+(2-\(y^n\)).(2+\(y^n\))
Bài 1: Nhân
a) 4x(3x-1)-2(3x+1)-(x+3)
b) (-2x^2-1xy+2y^2)(-1x^2y)
c) 4x(3x^2-x) -(2x+3)^2(6x^2-3x+1)
d) (x-2)(x+2)(x+4)
Bài 2: Tìm x
a) 4x(x-1)-3(x^2-5)-x^2=(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