There zeros of a function mean the x-intercepts. simpler way: At what x-values does the graph of the equation intersect the x-axis.
I don't know the if the last term of your function is +1 or -1 , so I did both for you using desmos graphing calculator.
You can also use quadratic formula, and do the algebra, and see if you get the same answer.
Answer:
the two number are 7 and 9
Step-by-step explanation:
2*x+y=25
3x-y = 20
add the two equations
2*x+y=25
3x-y = 20
---------------
5x = 45
divide by 5
5x/5 = 45/5
x = 9
lets find y
2x+y = 25
substitute x
2*9 +y =25
18+y =25
subtract 18 from both side
y = 25-18
y =7
Events are mutually exclusive only if they cannot both be true.
Only C is alright.
4 is a multiple of two so it can't be right.
Same logic works for B.
And then 2 is prime so then D is out too.