Sign In
Ask Question
Mathematics
Maryjane Terry
18 June, 11:51
How to solve x^2+8x+3 using the quadratic formula
+5
Answers (
1
)
Kate
18 June, 15:47
0
x = sqrt (13) - 4 or x = - 4 - sqrt (13)
Step-by-step explanation:
Solve for x:
x^2 + 8 x + 3 = 0
Hint: | Solve the quadratic equation by completing the square.
Subtract 3 from both sides:
x^2 + 8 x = - 3
Hint: | Take one half of the coefficient of x and square it, then add it to both sides.
Add 16 to both sides:
x^2 + 8 x + 16 = 13
Hint: | Factor the left hand side.
Write the left hand side as a square:
(x + 4) ^2 = 13
Hint: | Eliminate the exponent on the left hand side.
Take the square root of both sides:
x + 4 = sqrt (13) or x + 4 = - sqrt (13)
Hint: | Look at the first equation: Solve for x.
Subtract 4 from both sides:
x = sqrt (13) - 4 or x + 4 = - sqrt (13)
Hint: | Look at the second equation: Solve for x.
Subtract 4 from both sides:
Answer: x = sqrt (13) - 4 or x = - 4 - sqrt (13)
Comment
Complaint
Link
Know the Answer?
Answer
Not Sure About the Answer?
Get an answer to your question ✅
“How to solve x^2+8x+3 using the quadratic formula ...”
in 📙 Mathematics if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers
You Might be Interested in
What is the radius of the circle represented by the equation x^2 + y^2 - 6x + 4y = 12?
Answers (1)
Write two ways to make 15
Answers (1)
On the middle school baseball team, 8 players are sixth graders. Of the players, 40% are sixth graders. How many players are on the team? Explain your answer.
Answers (1)
If I subtract 2 from my grandfather's age, the result is divisible by 7. If I subtract 3 from my grandfather's age, the result is divisible by 5. If I subtract 5 from my grandfather's age, the result is divisible by 11. How old is my grandfather?
Answers (1)
A table is on sale with a 40% discount off the regular price. if the regular price of the table is $224.90, what is the sale price?
Answers (1)
New Questions in Mathematics
Find the sales tax of 48
Answers (2)
The numbers 1 through 9 are written on slips of paper and placed in a box. Calculate the theoretical probability that a number randomly pulled out of the box will be even.
Answers (1)
Subtract X from 3x-1
Answers (1)
Find an equation for the linear function which has f (150) = 1500f (150) = 1500 and f (650) = 3900f (650) = 3900
Answers (1)
Mrs. Warren is playing a crazy game of Monopoly with her son Ethan. In order to land on Boardwalk she will need double sixes. What is the probability as a percent that she will roll two sixes?
Answers (1)
Home
»
Mathematics
» How to solve x^2+8x+3 using the quadratic formula
Sign In
Sign Up
Forgot Password?