How do you simplify #(x + 9)(x -2)#?
1 Answer
Jan 23, 2017
Explanation:
Each term in the second bracket must be multiplied by each term in the first bracket. This can be achieved as follows.
#rArr(color(red)(x+9))(x-2)#
#=color(red)(x)(x-2)color(red)(+9)(x-2)# distribute the brackets.
#=x^2-2x+9x-18# collect like terms.
#=x^2+(-2+9)x-18#
#=x^2+7x-18#
