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victoriay3
10.11.2019 •
Mathematics
Answer this for 30
solve equation using "completing the square":
5n^2-6n-10=15
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Ответ:
> n = 3/5 + 1/5 √134 or n = 3/5 + -1/5 √134
Step-by-step explanation:
Let’s solve the equation step-by-step.
Step 1: Add 25 to both sides.
> 5n^2 - 6n - 25 = 0
Step 2: Since the coefficient of 5n^2 is 5, divide both sides by 5.
> 5n^2 - 6n = 25
Step 3: The coefficient of -6/5n is -6/5. Let b = -6/5.
> n^2 + -6n/5 = 5
Then we need to add ( b/2 )^2 = 9/25 to both sides to complete the square.
Add 9/25 to both sides.
> n^2 + -6n/5 + 9/25 = 134/25
Step 4: Factor left side.
> (n-3/5)^2 = 134/25
Step 5: Take square root.
> n-3/5 = + or - √134/25
Step 6: Add 3/5 to both sides.
> n = 3/5 + 1/5 √134 or n = 3/5 + -1/5 √134I hope it will be understood.If I have any inaccuracies please let me know.Have a nice day and never stop questioning!Ответ:
decimal form- 2.91516738..
explanation:
use the formula (b/2)^2 in order to create a new term. then, solve for n by using this term to complete the square.
hope this helped :)
Ответ:
Step-by-step explanation:
We are given that
Equation of curves
Both curves lie on S.
We have to find the equation of tangent plane at P(4,1,4).
Hence, t=0 and u then it satisfied the given point.
Substitute the values in the derivatives
The equation of tangent at point P(4,1,4) is given by