How do you simplify #(5 – 2x)(x + 3) times (x + 7)#?

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Answer 1 · 2018-06-18T10:22:54

Expand the brackets first

#(5-2x)(x+3)#

#5x+15-2x^2-6x#

#15-2x^2-x#

Now multiply this by #(x+7)#

#15x-2x^3-x^2+105-14x^2-7x#

#-2x^3-15x^2+8x+105#