1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Paha777 [63]
3 years ago
7

Solve the equation by completing the square. x^2-7x-4=0. Have to show steps.

Mathematics
1 answer:
Paul [167]3 years ago
4 0
X^2-7x-4=0
(x-7/2)^2-(7/2)^2-4=0
(x-7/2)^2-(7)^2/(2)^2-4=0
(x-7/2)^2-49/4-4=0
(x-7/2)^2+(-49-4*4)/4=0
(x-7/2)^2+(-49-16)/4=0
(x-7/2)^2+(-65)/4=0
(x-7/2)^2-65/4=0
(x-7/2)^2-65/4+65/4=0+65/4
(x-7/2)^2=65/4
sqrt[ (x-7/2)^2 ]=+-sqrt(65/4)
x-7/2=+-sqrt(65)/sqrt(4)
x-7/2=+-sqrt(65)/2
x-7/2+7/2=+-sqrt(65)/2+7/2
x=7/2+-sqrt(65)/2
x=[7+-sqrt(65)]/2
x1=[7-sqrt(65)]/2
x2=[7+sqrt(65)]/2
You might be interested in
What is the difference?
Len [333]

Answer:

D

Step-by-step explanation:

x/(x²+3x+2) - 1/[(x+2)(x+1)]

x² + 3x + 2 = x² + 2x + x + 2

= x(x + 2) + (x + 2)

= (x + 2)(x + 1)

= x/[(x+2)(x+1)] - 1/[(x+2)(x+1)]

= (x-1)/[(x+2)(x+1)]

= (x-1)/(x²+3x+2)

5 0
3 years ago
Read 2 more answers
Helpppppp me please
tensa zangetsu [6.8K]

Step-by-step explanation:

3 0
3 years ago
A surveryor wants to know how many shoppers at a mall like to read books. He surveys 100 people coming out of a bookstore at the
bonufazy [111]
Yes it is biased aaaaaaaaaaaaaaaaaaaaaaaaaa
3 0
2 years ago
Read 2 more answers
Find the value of x please help I give brainly<br> 20 points
fiasKO [112]

Answer:

x=148

Step-by-step explanation:

First, find the missing angle by subtracting 100+48 from 180 (all of the angles in a triangle add up to 180). Then, subtract that from 180 (the angles are a linear pair, so they are supplementry, so they add up to 180) x+32=180.

x=148.

(お役に立てれば!)

7 0
2 years ago
The length of two sides of an isosceles triangle are 5 and 16 what is the perimeter of this triangle
oee [108]
\lim_{n \to \infty} a_n⊂
5 0
2 years ago
Other questions:
  • SUPER EASY PROBLEM! IF YOU ANSWER CORRECTLY, YOU GET 30 POINTS + BRAINLY!!!!!!!!
    9·2 answers
  • Drake rolls two fair number cubes.
    13·1 answer
  • %equation %proportion<br> what is 13% of 4
    5·2 answers
  • 10 Points! Will give Brainliest to CORRECT answer!! (Question 1) If you are given the exact volume of a cylinder and it’s height
    13·1 answer
  • the weight of 3 kittens at one week of age were 3.6 ounces,4.2 ounces,And 3.3 ounces. If each kitten has gained 2.3 ounces, how
    6·1 answer
  • Parallel slope of y= 1/2 x - 1
    15·2 answers
  • Sara sold hotdogs and drinks at the soccer game.
    6·1 answer
  • I had $36. I spent 1/2 of my money on Thursday and 2/3 of the remainder on Wednesday. How much money did I have left?
    7·1 answer
  • BRAINLIEST PLEASE HELP AND YOU GET BRAINLIEST BRAINLIEST GET BRAINLIEST HELP ME FOR BRAINLIEST​
    8·2 answers
  • The length of the radius of a bicycle wheel is 14 inches. Which of the following is closest to the circumference of the wheel? A
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!