SOLUTION: someone help this question makes no sense i need steps so i can learn Find all real solutions of equation 2 x^2 + 4 x + 7 = 0. Does the equation have real solutions? Input

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: someone help this question makes no sense i need steps so i can learn Find all real solutions of equation 2 x^2 + 4 x + 7 = 0. Does the equation have real solutions? Input       Log On


   

Question 622049: someone help this question makes no sense i need steps so i can learn

Find all real solutions of equation 2 x^2 + 4 x + 7 = 0.
Does the equation have real solutions? Input Yes or No:
If your answer is Yes, input the solutions:
Found 2 solutions by Alan3354, ewatrrr:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Find all real solutions of equation 2x^2 + 4x + 7 = 0.
Does the equation have real solutions? Input Yes or No:
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Find the discriminant, = b^2 - 4ac
Disc = 4^2 - 4*2*7 = 16 - 56
Disc = -40
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If the Disc < 0 there are no real number solutions, 2 complex solutions.
If the Disc = 0 there are 2 real number solutions that are the same.
If the Disc > 0 there are 2 real number solutions that are different.

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,



Find all real solutions of equation 

2x^2 + 4x + 7 = 0.

 x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+ 

x+=+%28-4+%2B-+sqrt%28+16-56+%29%29%2F%284%29+ 

x+=+%28-4+%2B-+highlight%28sqrt%28+-40+%29%29%29%2F%284%29+  ****Note: NO real solutions result from sqrt%28-+number%29