Giup mk not bai nay , dang gap !

Thuc hien phep tinh:

a, (x -2) ^3 -x(x+1)(x-1) + 6x(x -3)

b, (x-2)(x^2 - 2x +4)(x+2)(x^2 +2x + 4)

Thanks moi ng nha !

a)(x-2)(3x+5)=(2x-4)(x+1)

b)(2x+5)(x-4)=(x-5)(4-x)

giup mk voi nha cam on

Bai  1 Phan tich da thuc thanh nhan tu

x^3 + 3x- 3xy- 3y

Bai 2 Tim x

( 2x - 1) ( 2x + 1) - 4 ( x ^2 +x ) = 16

cac bn lam on giup mink di ma

Bai 1. 12 chia het ( x + 3 )

bai 2. Tim so tu nhien x, biet 6x + 4 chia het cho 2x

cac ban nho giai chi tiet giup minh nha cam on

bai 1: Tim x

a) (x-1)^3 =27

b ( 2x +1)^2=25

c) (x-1)^x+2=(x-1)x+4

d) ( 2x-1)^3 =-8

e) 2^2x-2x=96

                 GIUP MK VOI NHA MK DANG CAN GAP LAM 

tinh nhanh bieu thuc sau

a) x^6-20x^5-20x^4-20x^4-20x^3-20x^2-20x+1992 voi x= 21

b)x^7-26x^6+27x^5-47x^4-77x^3+50x^2+x+1989 tai x = 25

c)4029-2015x+2015x^2-....+2015x^2014-x^2015 tai x= 2014

d)A= (x-1/x-2015+x-2/x-2014+x-3/x-2013+....+x-2014/x-2+x-2015/x-1):(1/2 +1/3+1/4+....+1/2016) tai x=2016 dau / o day la phan do nha!!

xin nho cac ban giai giup cho minh! cam on nhieu!!!!!!!! minh dang can ket qua gap 

bai 1: tinh nhanh

168x168-168x58 / 110

( 456x11+912 )x37 / 13x74

864x48-432x96 / 864x48x432

16x17x5 / 16x16+11

45x16-17 / 28+45x15

bai 2: tinh bang 2 cach

a . ( 15/8 - 3/4 ) x 4

b. 3x ( 2/3 + 7/9 )

bai 3 : tim so tu nhien n

121/ 27 x 54/11 < n < 100/21 : 25/126

giup mk ca 3 bai nha cac ban , cam on cac ban nhieu

nhanh nen nha , chieu mai mk phai nop bai roi

1, 1/6 (2x - 3) = -1/2 (x-1/4) - 2/3

2, 17/-8 : 3/4 + 2 . | 3/2x - 1 | = -1/2

3, | x^2 + 1/2 | - 15 1/2 = -12 3/4

Lam giup mik nha (nhanh)

tim x biet 

a) 4(x+1)^2-9(x+2)^2=0

b) 4(x+1)^2+(2x-1)^2-8(x+1)(x-1)=11

giai cach lam giup minh nha