The quadratic formula, for the equation ax² + bx + c = 0, where a ≠ 0, is:
x = (-b plus or minus √(b² - 4ac)) ÷ 2a. From this formula...
...the discriminant of ax² + bx + c = 0 is given by Δ = b² - 4ac.
If Δ > 0, then there are two real roots. If Δ < 0, there are no real solutions.
If Δ = 0, there is exactly 1 real root.
Using this, we can substitute the coefficients for j into the discriminant formula. Δ = 3² - 4(-4)(-28), which equals 9 - (448), which is clearly less than 0.
So there are NO REAL ROOTS to -4j² + 3j - 28 = 0
Hope this helps!
5:20 because there are 10 red marbles and 10 yellow marbles which equals 20 marbles all together and half of the 10 yellow marbles are plastic so 10 divided by 2 = 5
(1:4 if you need it simplified)
Answer: option D -1,0,2
Step-by-step explanation:
2^x-2
When x=0
We have 2^0-2
1-2=-1
when x=1
We have 2^1-2
2-2=0
When x=2
We have 2^2-2
4-2=2
The answer is a.162 because 162.5 rounds down to 162