Question

1)2x^2-4xy+2y^2-32

2)5x^2-5y^2-x+y

3)x^2-9xy+20y^2

4)4x^2(x+y)-x-y

5)16+ty^2+6xt-9t+x^2

Giai bang phuong phap phan tich thanh nhan tu chung bang cach nhom hang tu.

Mai mình nộp bài,mong giaup đó

 

Answer 1

1.  =2(x²-2xy+y^2-16)

     =2((x-y)²-4²)

     =2(x-y-4)(x-y+4)

Answer 2

2.   =5(x²-2.1/10.x+1/100-y²+2.1/10y-1/100)

      =5.((X-1/10)²-(Y-1/10)²)

      =5(X-1/10-Y+1/10)(X-1/10+Y-1/10)

      =5(X-Y)(X+Y-2/10)

Answer 3

3.   =(X²-9XY+81/4Y²)-1/4Y²

      =(X-9/2Y)^2-1/4Y^2

     =(X-9/2Y-1/2Y)(X-9/2Y+1/2Y)

     (X-5Y)(X-4Y)

Answer 4

4.    =4X^2(X+Y)-(X+Y)

       =(X+Y)(4X^2-1)

      =(X+Y)(2X-1)(2X+1)

Answer 5

cam on ban nhe,nhung con cau 5