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stepan [7]
3 years ago
15

NEED HELP NOW 100 POINTS WILL MARK BRAINLIEST PLZ ANSWER ALL 5 PHOTOS BELOW!!!!!!

Mathematics
2 answers:
ira [324]3 years ago
8 0
The answers are as follows:
1-D
2-B
3-C
4-A
BabaBlast [244]3 years ago
5 0

39=a 40=c 41=a 42=b 43=a 44=d 45=c 46=a 47=d. I hope this helped!



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Answer:

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x² = 19x + 12

⇔ x² - 19x - 12 = 0

Calculating the discriminant :

b² - 4ac = (-19)² - 4×1×(-12) = 409

The discriminant is positive ,then the equation has two solutions.

x=\frac{19-\sqrt{409} }{2} \ \ or\ \ x=\frac{19+\sqrt{409} }{2}

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