Question

Answer 1

ai làm hộ với ạ

 

Answer 2

1) \(=5\left(x-4y\right)\)

2) \(=x\left(x+y\right)-5\left(x+y\right)=\left(x+y\right)\left(x-5\right)\)

3) \(=\left(2x-5\right)\left(2x+5\right)\)

4) \(=\left(x+2y\right)^2\)

5) \(=\left(x-y\right)\left(x+y\right)-\left(x+y\right)=\left(x+y\right)\left(x-y-1\right)\)

6) \(=5\left(x-y\right)+a\left(x-y\right)=\left(x-y\right)\left(a+5\right)\)

7) \(=x^2\left(x^2+2x+1\right)=x^2\left(x+1\right)^2\)

8) \(=\left(x-5\right)^2\)

9) \(=\left(x-y\right)^2-z^2=\left(x-y-z\right)\left(x-y+z\right)\)

10) K hiểu đề lắm