Question

HURRY PLEASE I WILL FAIL MATH IF I DON'T GET THIS RIGHT!! NO JOKE PLEASE HELP

Two numbers have a sum of 2 and a product of -8. The quadratic equation -n^2 + 2n + 8= 0 can be used to
determine the two numbers.

A) Graph the related function f(n)= -n^8 +2n+8 and determine its x-intercepts

B) What are the two numbers?

for A you can just tell me the x intercepts

Answer 1

A) x + y = 2
B) x * y = -8
B) y = -8 / x  we can substitute this into equation A
A) x + -8 /x = 2 multiplying both sides by "x"
A) x² -8 = 2x
x² +2x -8 = 0
(x + 4) * (x -2)
The 2 numbers are -4 and 2