Show all your work please!
Please write it as if you were a 9th Grader!
This is worth 12 points!
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Find the roots.

f(n)=n^2-2n-15

-3 and 5

Step-by-step explanation:

f(n) = n² - 2n - 15

numbers whose product is -15 and sums up to -2 = -5 and 3

= n²- 5n+3n - 15

= n(n - 5) +3 (n - 5)

f(n) = (n + 3)( n - 5)

n + 3 = 0 n - 5 = 0

n = -3 n = 5

Roots = -3 and 5

the forst and 3rd

step-by-step explanation:

well there are two answers for that.

1: you need 120 ones then that will equal up to 120.

2: you could also do one 100 and 2 tens.

those are the answers that i have thought of.