Question

Phân tích đa thức thành nhân tử:

1. a.(b+c)+3b+3c

2. a.(c-d)+c-d

3.mx+my+5x+5y

4. 4x+by+4y+bx

5. 1-ax-x+a

Answer 1

1,\(a\left(b+c\right)+3b+3c=a\left(b+c\right)+3\left(b+c\right)=\left(b+c\right)\left(a+3\right)\)

2,\(a\left(c-d\right)+\left(c-d\right)=\left(c-d\right)\left(a+1\right)\)

3,\(mx+my+5x+5y=m\left(x+y\right)+5\left(x+y\right)=\left(x+y\right)\left(m+5\right)\)

4,\(4x+by+4y+bx=4\left(x+y\right)+b\left(x+y\right)=\left(x+y\right)\left(4+b\right)\)

5,\(1-ax-x+a=\left(1-x\right)+a\left(1-x\right)=\left(1-x\right)\left(a+1\right)\)