How do you subtract #(4- 6d ^ { 2} ) - ( 9d ^ { 2} - 7)#?

2 Answers
Jun 3, 2018

Answer:

#11-15d^2#

Explanation:

#4-6d^2-(9d^2-7)=4-6d^2-9d^2+7=11-15d^2#

Answer:

#11-15d^2#

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#