K
Khách

Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.

15 tháng 8 2021

mik nhầm môn

15 tháng 8 2021

TA à

8 tháng 9 2019

\(4x^2-6x-16⋮x-3\)

\(\Leftrightarrow4x^2-12x+6x-18+2⋮x-3\)

\(\Leftrightarrow4x\left(x-3\right)+6\left(x-3\right)+2⋮x-3\)

\(\Leftrightarrow\left(x-3\right)\left(4x+6\right)+2⋮x-3\)

Mà \(\left(x-3\right)\left(4x+6\right)⋮x-3\)

\(\Rightarrow2⋮x-3\)

\(\Rightarrow x-3\inƯ\left(2\right)=\left\{\pm1;\pm2\right\}\)

làm nốt

8 tháng 9 2019

cách 2:

4x^2-6x-16 x-3 4x+6 4x^2-12x - 6x-12 6x-18 - 2

Để \(4x^2-6x-16\)chia hết cho x-3 

\(\Leftrightarrow2⋮x-3\)

\(\Leftrightarrow x-3\inƯ\left(2\right)=\left\{\pm1;\pm2\right\}\)

Làm nốt

bn ơi cho mk hỏi bn lm tiếng anh hay toán mà chủ đề là tiếng anh mà bài lại là toán vậy alo????

17 tháng 8 2020

aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

15 tháng 9 2021

giúp mình với mình cần gấp

15 tháng 9 2021

a)A=(2x+y)2-(y-2x)2

\(A=(2x+y-y+2x)(2x+y+y-2x)\)

\(A=4x.2y=8xy\)

b)B=x2-y2+(x-y)2

\(B=x^2-y^2+x^2-2xy+y^2\)

\(B=2x^2-2xy\)

Lần sau bạn đăng vào môn Toán nhé!!!

13 tháng 8 2021

Toán mik ghi nhầm ko phải ta

13 tháng 8 2021

em ghi nhầm môn em có thể đăng lại ko em

13 tháng 9 2016

a) \(x^2+x+\frac{1}{4}=\left(x+\frac{1}{2}\right)^2\)

b) \(x^2+12xy+36y^2=\left(x+6y\right)^2\)

c) \(4x^2-12xy+9y^2=\left(2x-3y\right)^2\)

d) Không phải hằng đẳng thức \(\left(x^2-2x+4=\left(x-1\right)^2+3\right)\)

e) \(25x^2+4y^2-20xy=\left(5x-2y\right)^2\)

19 tháng 12 2017

bạn à, lộn môn rồi, đây là môn tiếng anh ko phải toán

24 tháng 9 2019

a) a^2 (x-y) +y-x

  = a^2 (x-y) -(x-y)

  = (x-y) (a^2 -1)

  = (x-y)(a-1)(a+1)

b) m^2 -25y^2+10y -1

= m^2 -(25y^2 -10y +1)

= m^2-(5y-1)^2

=(m-5y+1)(m+5y-1)

c)  a^2 -4x^2 +8x -4

= a^2 -(4x^2 -8x+4)

=a^2 -( 2x-2)^2

=(a-2x+2)(a+2x-2)