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iragen [17]
3 years ago
5

Solve the quadratic formula 2x^2+9x=-7

Mathematics
1 answer:
andriy [413]3 years ago
5 0

Answer:

Step-by-step explanation:

2x² + 9x = -7

2x² + 9x + 7 = 0

When we multiply we should get 2*7 = 14 and when we add we should get 9. Find the factors of 14 ---> 1,2,7,14. Factors are 2,7 as when we multiply we get 14 and we we add, get 9

2x² + 2x + 7x + 7 = 0

2x( x + 1) + 7 (x + 1) = 0

(x  + 1)(2x + 7) = 0

                   

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The mean of the data set is 15.What number is missing? 9,12,16,18,23
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The number 12 is missing in the data set.

<u>Step-by-step explanation</u>:

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Mean = Sum of the integers / Total number of integers.

15 = (9+12+16+18+23+x) / 6

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Troyanec [42]

Answer:

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Therefore this one is logarithmic.

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Which properties were applied in steps 1 and 3
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