(3y+2x)(5y-4x) expand it?

15y² - 2xy - 8x²

(3y + 2x)(5y - 4x)
3y(5y-4x) +2x(5y-4x)
15y^2 - 12xy +10xy - 8x^2
15y^2 -2xy -8x^2.

To expand, multiply the two factors is just like multiplying numbers

3y + 2x
* 5y - 4x
--------------
-12xy - 8x^2
15y^2 +10xy
----------------------------
15y^2 - 2xy - 8x^2

(3y+2x)(5y-4x) = 15y^2 - 2xy - 8x^2

15y<square>-2xy-8x<square>

15y^2-2xy -8x^2

(3y+2x)(5y-4x)
= 3y * 5y + 2x * 5y - 3y * 4x - 2x * 4x
= 15y^2 + 10xy - 12xy - 8x^2
= 15y^2 - 2xy - 8x^2

(3y+2x)(5y-4x)

3y(5y-4x)+2x(5y-4x)

15Y^2 - 12xy + 10xy -8x^2

15y^2 - 2xy - 8x^2 = answer = expanded!! :D

15y^2 - 2xy - 8x^2