What is #(-3x-7)+(-6x+9)#?

1 Answer
Don't Memorise
Mar 13, 2016

# = -9x +2#

Explanation:

#(-3x - 7) + (-6x+9)#

# = color(blue)(-3x) color(purple)(- 7) color(blue)(-6x)+ color(purple)(9#

Grouping like terms.

# = color(blue)(-3x) color(blue)(-6x)+ color(purple)(9- 7)#

# = color(blue)(-9x) + color(purple)(2)#

# = -9x +2#

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