Question

Mn ơi giúp em bài này với ah

Answer 1

bạn đăng tách ra nhé

a, \(=x\left(3y+1\right)+5\left(3y+1\right)=\left(x+5\right)\left(3y+1\right)\)

b, \(=9-\left(x-y\right)^2=\left(3-x+y\right)\left(3+x-y\right)\)

c, \(=x\left(y-z\right)-\left(z-y\right)=\left(x+1\right)\left(y-z\right)\)

Answer 2

a,3xy+x+15y+5

<=> x(3y+1)+5(3y+1)

<=>(3y+1)(x+5)

<=>\(\left[{}\begin{matrix}y=\dfrac{-1}{3}\\y=-5\end{matrix}\right.\)

Answer 3

b, 

-(x−y)\(^2\)