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HELP PLEASE 50 POINTS !!!!

HELP PLEASE 50 POINTS !!!!-example-1
User Mikus
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Answer:

Explanation:

D is the discriminant of the quadratic equation on left. It tells you how many solutions there are.

D=negative >2 imaginary/complex solutions

If D is negative, you can never get negative under a square root so you get imaginary numbers

D=0 >1 real solution

If D is 0, the ± goes away so you only have 1 solution

D = positive >2 real solutions

If D is positive, then you get 2 real solutions.

Solution:

(A) x² + 6x + 9

a=1

b=6

c=9

D = b² - 4ac

D = 6² - 4(1)(9)

D = 36 - 36

D = 0 >From explanation above 1 real solution

(B) x² +2x +3

a=1

b=2

c=3

D = b² - 4ac

D = 2² - 4(1)(3)

D = 4 -12

D = -8 >negative, from above 2 imaginary/complex solutions

User Romain Vincent
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