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stiks02 [169]
2 years ago
9

2. Solve x2 + 2x + 7 = 0 using the Quadratic Formula​

Mathematics
2 answers:
pantera1 [17]2 years ago
5 0

Answer:

x=7/4

Step-by-step explanation:

4x=-7=4x/-4=-7/-4=      x=7/4

Alchen [17]2 years ago
3 0

Answer:

  • -1 ± i√7

Step-by-step explanation:

  • x² + 2x + 7 = 0
  • D = 2² - 4*7 = 4 - 56 = -52
  • x = (-2 ± √-28)/2 = (-2 ± 2√-7)/2 = -1 ± i√7
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4 years ago
Solve for z<br> 3z-5+2z=25-5z
iren [92.7K]

Answer:

z=3

Step-by-step explanation:

Add 3z and 2z

5z-5=25-5z

Add 5z on both sides to eliminate the -5z on the RHS

10z-5=25

Add 5 on both sides to eliminate the -5 on the LHS

10z=30

Divide by 10

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Hope this helps!

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3 years ago
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6 0
3 years ago
It says ( Find the length of the hypotenuse )<br> ~<br> Pls?<br> Thanks!
Mashcka [7]

Answer:

5

Step-by-step explanation:

In order to solve this problem, we need to use Pythagorem Theorem (a^2+b^2=c^2)

When using the pythagorem theorem the hypoteneuse would be the c^2 and the two other sides would be a and b (the order doesn't matter).

So, our formula would be:

4^2+3^2=c^2

Simplifies into:

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In order to remove the exponent 2, we would have to square root both sides by 2. After doing so, you get the answer 5.

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