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Kay [80]
3 years ago
5

Complete the square to solve the equation below.

Mathematics
2 answers:
Igoryamba3 years ago
8 0
We need to solve for the values of x by applying the method of completing the square in the given expression x² - 10x -2 = 17. The solution is shown below:
x² - 10x -2 = 17
Transpose -2 to the right side such as:
x² - 10x = 17 + 2
Perform addition of 17 and 2
x² - 10x = 19
Add + 25 in both sides
x² - 10x + 25 = 19 + 25
x² - 10x + 25 = 44
(x-5)(x-5) = 44
Where (x-5) is a perfect square, then we have:
(x-5)² = 44
x1 = +√44 -5 = 1.6
x2 = - √44 -5 = -11.6

The answers are x1=1.6 and x2 = -11.6.
Angelina_Jolie [31]3 years ago
5 0

Answer:

Option A and B  (x-5)^2-44=0

Step-by-step explanation:

We have given that : x^2 - 10x - 2 = 17

Applying completing the square

Step 1 :  x^2 - 10x - 2 = 17 (write the equation)

Step 2:  x^2 - 10x = 17+2

Step 3: x^2 - 10x +25 =19+25 (add 25 both side)

Step 4:  (x-5)^2=44

Step 5: (x-5)^2-44=0

Square to solve the equation is A and B as both are same.

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Kaylin buys a greeting card for $3.79. she then buys 4 postcards that all cost the same amount. the total cost is $5.11. how muc
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