x2 12 8x y3 6y2 9y 54 8x2 14x 15Solution13 xx4 14 y36y

x^2 + 12- 8x y^3 + 6y^2 - 9y - 54 8x^2 + 14x - 15

Solution

13. x(x+4)

14. (y³+6y²)+(-9y-54)

factor out y² from y³+6y² :y²(y+6)

factor out -9 from -9y-54 : -9(y+6)

=y²(y+6)-9(y+6)

factor out common term (y+6)

=(y+6)(y²-9)

=(y+6)(y-3)(y+3)