How do you multiply #3y^2z(2y^2z + 4yz - y + z)#?

1 Answer
Don't Memorise
Jun 26, 2015

# =color(green)(6y^4z^2+ 12y^3z^2 -3y^3z + color(green)(3y^2z^2) #

Explanation:

# color(green)(3y^2z)(2y^2z+4yz-y+z)#

# =color(green)(3y^2z) . (2y^2z) + color(green)(3y^2z) . (4yz)- color(green)(3y^2z) .( y)+ color(green)(3y^2z) . (z)#

# =color(green)(6y^4z^2+ 12y^3z^2 -3y^3z + color(green)(3y^2z^2) #

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