How do you factor #5v ^ { 2} - 15v - 90# completely?
2 Answers
Apr 20, 2018
Explanation:
We want to find two numbers that when added give us
The factors of
The numbers
We can double check this by expanding again.
Multiplying all of this by five we get
Apr 20, 2018
Explanation:
#"take out a "color(blue)"common factor "5#
#=5(v^2-3v-18)#
#"the factors of - 18 which sum to - 3 are - 6 and + 3"#
#=5(v-6)(v+3)#