How do you simplify #-5 (c + d) -4d + 5c - d#?

1 Answer
Don't Memorise
Apr 1, 2016

#= color(green)(- 10d)#

Explanation:

#color(blue)( - 5) ( c+d) -4d + 5c - d#

#= color(blue)( (- 5)) * ( c) + color(blue)( (-5) ) * (d) -4d + 5c - d#

#= color(green)(- 5 c) -5 d -4d + color(green)(5c) - d#

#= cancelcolor(green)(- 5 c) -5 d -4d + cancel color(green)(5c) - d#

#= -5 d -4d - d#

#= color(green)(- 10d)#

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