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arinegrete2003
28.02.2020 •
Mathematics
How do i solve a quadratic equation like this
Solve.
3n2 = 147
A{–3, 7}
B{–7, 3}
C{–49, 49}
D{–7, 7}
Solved
Show answers
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Ответ:
Option D. {–7, 7}
Step-by-step explanation:
3n^2 = 147
First, divide both side 3
n^2 = 147/3
n^2 = 49
Next, rearrange the variables to one side of the equation as shown below:
n^2 — 49 = 0
n^2 — 7^2 = 0
The above is now difference of two squares. This can be solve by doing the following:
(n — 7)(n + 7) = 0
n — 7 = 0 or n + 7 = 0
n = 7 or n = —7
Ответ:
D{–7, 7}
Dtep-by-step explanation:
3n² = 147
n² = 147/3
n² = 49
n = 7, -7
Ответ:
5 workouts should be performed to equalize the costs between both gyms.
Step-by-step explanation: