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How do you multiply #3x(x+9)#?

1 Answer

Jun 25, 2015

# = color(green)(3x^2 + 27x#

Explanation:

#color(green)( 3x)(x+9)#

Here #color(green)(3x)# needs to be multiplied with each term within brackets:

#= color(green)(3x) . (x) + color(green)(3x) . (9)#
# = color(green)(3x^2 + 27x#

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