(4x-3)(3x+2)-(6x+1)(2x-5)+1
rut gon bieu thuc
rut gon bieu thuc (6x+7)(2x-3)-(4x+1)(3x-7/4)
Rut gon bieu thuc:
2(2x-3)^2+(x-2)(x+2)
(12x^2y^2-6x^3y^2):3x^2y:-4y(2x-5)
\(\frac{x+3}{x^2-4}.\frac{8-12x+6x^2-x^3}{9x+27}\)
rut gon bieu thuc
rut gon phan thuc A=(x^3-6x+7)/(x^3+5x^2-2x-24)
I> Cho bieu thuc
A = ( \(\frac{2x+1}{2x-1}\)- \(\frac{2x-1}{2x+1}\)) : \(\frac{8x}{3-6x}\)( voi x khac + - \(\frac{1}{2}\)x khax 0 )
a . Rut gon bieu thuc A
b . Tim x de A = \(\frac{3}{-4031}\)
II> Cho bieu thuc
B = ( \(\frac{1}{1-x}\)+\(\frac{2}{x+1}\)-\(\frac{5-x}{1-x^2}\)) : \(\frac{1-2x}{x^2-4}\)
a . Rut gon bieu thuc B
b . Tìm giá trị nguyên của x để giá trị của biểu thức B là số nguyên
Rut gon cac bieu thuc sau:
2(x-y).(x+y)+(x-y)^2+(x+y)^2
(2x-3).(4x^2+6x+9) -(54+8x)
(3x+y).(9x^2-3xy+y^2)-(3x-y).(9x^2+3xy+y^2)
(a +b +c)^2-(a-c)^2-2ab+2bc
tim GTLN hoac GTNN cua bieu thuc C= -x2+6x+1
cho x+y =1 . tinh gia tri cua bieu thuc A=x^3+y^3+3xy
chox-y=1. tinh gia tri cua bieu thuc B=x^3-y^3-3xy
cho x+y=1 . tinh gia tri cua bieu thuc C=x^3+y^3+3xy(x^2+y^2)+6x^2*y^2(x+y)