You could check these four answers by subbing them, one by one, into the original equation. Or you could immediately apply the quadratic formula to
<span>x^2 -6x-22. I'd rather be proactive and calculate the roots myself.
Using a=1, b= -6 and c = -22, we get discriminant (-6)^2 - 4(1)(-22), which evaluates to 36+88 = 124. 124 in turn can be factored: 124 = 4(31).
then:
-(-6) plus or minus sqrt( [-6]^2 - 4(1)(-22) )
x = ----------------------------------------------------------
2
6 plus or minus 2*sqrt(31)
= -----------------------------------------
2
= 3 plus or minus sqrt(31)
Note that these are REAL roots, in complete disagreement with the four answer choices. Please ensure that you have copied the quadratic expression accurately.
Remind yourself that if the discriminant is +, as it is in this case, you have 2 distinct real roots.</span>
jaso saknihh Step-bnswerda po sha jasony-step explanation:
Answer:
Step-by-step explanation:
i think its x=3
Answer:
21 for the first one, 144 for the second
Step-by-step explanation:
If you're seeing the same problem I am in class, the rule is: <em>N + 9</em>
N is equal to 12 in this equation
<em>12 + 9 is 21.</em>
So, the answer is 21
If there is a second problem, like there is for the one I'm seeing, then this is the answer for that-
Is <em>12(12)= </em>144
Hope this helps!
(By the way, I'm horrible at math so this could be completely wrong)
Answer:
2 and 2/3
Step-by-step explanation:
that is the answer