annanguyen360 annanguyen360

02-08-2020
Mathematics

contestada

Find the zeros of y = x2 - 8x - 3 by completing the square.
O A. x=3+√7
B. X = +3
C. X = 4 + 119
O D. X= -4 + 119

Respuesta :

CSMedrano CSMedrano

02-08-2020

Answer:

Assuming that you meant 4+√19 is C.

Step-by-step explanation:

[tex]x^2-8x-3=x^2-2(4)x-3=x^2-2(4)x+16-3-16\\(x-4)^2-19\\(x-4)^2-19=0\\(x+4)^2=19\\x+4=\sqrt{19} \\x=-4+-\sqrt{19}[/tex]

Answer Link

camrynleaks61 camrynleaks61

17-09-2020

B. X=+3 by completing the square

Answer Link

Otras preguntas

8 7/8 + (7 5/6 − 2 1/3)

Suppose y varies directly with x, and y = 8 when x = –6. What direct variation equation relates x and y? What is the value of y when x = –2?

(100 points on this) The box is laid on its side and the white label covers 60% of the lateral surface area of the box. Find the length of the box.

i need help with this i’m really struggling i just don’t get it

The data represent the time, in minutes, spent reading a political blog in a day. Construct a frequency distribution using 5 classes. In the table, include t

Working out for 5(a+3)=8

What’s 5 1/2 times 5/8?

Which use of the Internet could have a negative impact on a company's competitive position?

An incomplete graph of the polynomial function f(x)=4x^4-16x^3-8x^2+16x+64 is shown a.find all the zeros of the function b. Without using a graphing utility d

Which of the following statements concerning parenting is not accurate? Parents who are active outside the home have the most trouble dealing with empty nest. M