How do you multiply #(3a-2)(a-1)#?

1 Answer
Alan P.
Jun 22, 2016

#(3a-2)(a-1)=underline(3a^2-5a+2)#

Explanation:

One method is by distribution:
#(color(red)(3a)color(blue)(-2))(color(green)acolor(brown)(-1))#
#color(white)("XXX")=color(red)(3a)(color(green)(a)color(brown)(-1))color(blue)(-2)(color(green)(a)color(brown)(-1))#

#color(white)("XXX")=(color(purple)(3a^2-3a))color(blue)(-)(color(cyan)(2a-2))#

#color(white)("XXX")=3a^2-5a+2#

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