How do you subtract #(4- 6d ^ { 2} ) - ( 9d ^ { 2} - 7)#?
2 Answers
Jun 3, 2018
Explanation:
Jun 3, 2018
Explanation:
#"distribute brackets and "color(blue)"collect like terms"#
#"note that the second bracket is multiplied by "-1#
#1(4-6d^2)-1(9d^2-7)#
#=color(red)(+4)color(blue)(-6d^2)color(blue)(-9d^2)color(red)(+7)#
#=11-15d^2#
