Which statement describes a disadvantage of Marnie paying a bill by telephone with a credit card or a debit card? Marnie will no
2 answers:
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Answer:
<em>d</em> = or 8.60
Step-by-step explanation:
(5, 8) (-2, 3)
Let 5 =
8 =
-2 =
3 =
Plug in the values into the equation to get the distance:
<em>d = </em><em />
<em>d </em>=
<em>d = </em>
<em>d</em> =
<em>d = </em> or 8.60
Hey there!
<u>Use the quadratic formula to find the solution(s). x² + 2x - 8 = 0</u>
- Answer :
x = -4 or x = 2 ✅
- Explanation :
<em><u>Quadratic</u></em><em><u> </u></em><em><u>formula </u></em><em><u>:</u></em><em><u> </u></em>ax² + bx + c = 0 where a ≠ 0
The number of real-number solutions <em>(roots)</em> is determined by the discriminant (b² - 4ac) :
- If b² - 4ac > 0 , There are 2 real-number solutions
- If b² - 4ac = 0 , There is 1 real-number solution.
- If b² - 4ac < 0 , There is no real-number solution.
The <em><u>roots</u></em> of the equation are determined by the following calculation:
Here, we have :
- a = 1
- b = 2
- c = -8
1) <u>Calculate </u><u>the </u><u>discrim</u><u>i</u><u>n</u><u>ant</u><u> </u><u>:</u>
b² - 4ac ⇔ 2² - 4(1)(-8) ⇔ 4 - (-32) ⇔ 36
b² - 4ac = 36 > 0 ; The equation admits two real-number solutions
2) <u>Calculate </u><u>the </u><u>roots </u><u>of </u><u>the </u><u>equation</u><u>:</u>
▪️ (1)
▪️ (2)
>> Therefore, your answers are x = -4 or x = 2.
Learn more about <u>quadratic equations</u>: