chung minh bieu thuc ko phu thuoc vao gia tri cua bien
A=(2x+5).(4x^2-6x+9)-2(4x.3-1)
B=(x+3)^3-(x+9).(x^2+27)
chung minh gia tri cua bieu thuc sau ko phu thuoc vao gia tri cua bien
A=(x+2)(3x-1)-x(3x+3)-2x+7
B=( 2x-3 ) ( 2x+3 )-x( 3+4x )+3x+1
chung minh rang cac bieu thuc sau khong phu thuoc vao gia tri cua bien x, biet B= x (x^3 + 2x^2 - 3x +2) - (x^2+ 2x) x^2 +3x ( x-1) +x-12
chung to bieu thuc khong phu thuoc vao gia tri cua bien
a)(x-1)(x+1)(x2+1)-(x-2)(x+2)(x2+4)
b)(3x-1)(2x+7)-(x+1)(6x-5)-(18x-12)
c /m bieu thuc sau khong phu thuoc vao gia tri cua x
(2x+3) (4x^2-6x+9)-2(4x^2-1)
(x-1) ^3 –x(x-3)^2 +1
(X+2)^2 –x^2 (x+6)
Gia tri cua bieu thuc (x+2)^3 –(x-2)^3 co phu thuoc vao bien ko
4 timf x
(x+1)^3-x^2(x+3)=2
(x-2)^3 – x(x+1)(x-1)+6x^2 = 5
chung minh bieu thuc sau ko phu thuoc vao x ( 2x + 3) (4x^2 - 6x + 9 ) - 2 ( 4x^3 - 1 )
giai nhanh giup minh voi minh voi
cmr gia tri cua bieu thuc khong phu thuoc vao gia tri cua bien
giúp mình nha đang cần gấp
y(x^2-y^2)(x^2+y^2)-y(x^4-y^4)
(1/3+2x)(4x^2-2/3x+1/9)-(8x^3-1/27)
(x-1)^3-(x-1)(x^2+x+1)-3(1-x)x
(3x-2y)^2+(3x+2y)^2-18x^2-8y^2+3
(-x-3)^3+(x+9)(x^2+27)+2019
p=(m^2-2m+4)(m+2)-m^3(m+3)(m-3)-m^2-18
chung minh gia tri cua N=(x+y)^3-9(x+y)^2+27(x+y)-27 ko phu thuoc vao m
