solve this quadratic equation n2-9n-10=0
n2-9n-10 = 0
n2-9n = 10
n(2-9) = 10
n = 10/(2-9) = 10/-7 = -1.429 (rounded to 3 decimal places)
Solve for n: n^2-9 n-10 = 0
The left hand side factors into a product with two terms: (n-10) (n+1) = 0
Split into two equations: n-10 = 0 or n+1 = 0
Add 10 to both sides: n = 10 or n+1 = 0
Subtract 1 from both sides: Answer: | n = 10 or n = -1
