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alisha [4.7K]
3 years ago
14

Evaluate b^2 - 4ac = -1, b = -5, and c =2. show steps pls!!

Mathematics
2 answers:
Alex Ar [27]3 years ago
6 0
B² - 4ac = 
(-5)² - 4*(-1)*(2) =
25 + 8 = 
33  ← answer
Alona [7]3 years ago
4 0
B^2 - 4ac =

b=-5
a=-1
c=2
 
So then it equals =
(-5)^2 - 4(-1)(2)

-5^2 = Equals 25

the power of 2 is multiplying the same number it's powering. Two negatives = a positive. so 5x5 = 25.

4 x -1 x 2 = -8

4 x -1 = -4 and -4 x 2 = -8.

25 - (-8) = 33
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Question: Antonio is working with a new geometric series generated by the equation A(n)=20(1.1)^n-1.His sister challenged him to
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A(22) = 20(1.1)^22-1

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sum of geometric sequence

formula

Sn = a1(1-r^n)/1-r

Sn = sum

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sum of 22nd = 1,428.05.

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miniwebtoolcomgeometricsequencecalculator

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