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
Kitty [74]
3 years ago
5

Complete The Square: (Z^2)-19z=66

Mathematics
1 answer:
Musya8 [376]3 years ago
8 0
To solve the equation using complete square method we proceed:
z^2-19z=66
but
 c=(-b/2a)^2
c=(-19/2)^2
c=361/4
thus:
z^2-19z+361/4=66+361/4
factoring the LHS we get:
1/4(2z-19)^2=625/4

(2z-19)^2=625
getting the square root of both sides we get:
2z-19=+/-25
2z=+/-25+19
2z=44 or -6
z=22 or -3
Answer: z=22 or z=-3



You might be interested in
Help please!!!! I will really appreciate it please help
Scorpion4ik [409]

Answer:

Correct answer is x = 28°

Step-by-step explanation:

Okay we know Angle A is 2x + 2

Angle B is 90

Angle C is 180 - 148 = 32 ( straight line angle is 180)

Sum of all angles should be 180 in a triangle

which means

A + B + C = 180

2x + 2 + 32 +90 = 180

2x + 124 = 180

2x = 180-124

2x = 56

x = 56/2

x = 28

4 0
3 years ago
Read 2 more answers
What is the least common factor of 10 and 25?
swat32
The best common factor of 10 and 25 are 5
3 0
3 years ago
Read 2 more answers
It will take five builders 62 days to complete a particular project. At this rate, how long would the project take if there were
Lena [83]

Answer:

2 builder complete work = 155 days

Step-by-step explanation:

Given:

5 builder complete work = 62 days

So,

1 builder complete work = 62 days × 5

if,

2 builder complete work = [62 days × 5] / 2

2 builder complete work = 155 days

6 0
3 years ago
What is the area of one face of a four-inch cube?
miskamm [114]

Answer:

The area is 16

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Show your work please
liubo4ka [24]
Can you make the picture bigger it’s not letting me zoom
3 0
3 years ago
Other questions:
  • If you were an adult and you received a stimulus check, what would your plan be to utilize the funds given?
    15·1 answer
  • Hello! please help me
    5·1 answer
  • Help me please I need an answer now, please
    12·1 answer
  • In 1920, a woman had 4 daughters. In 1950, each daughter had 3 daughters. In 1980, each of their daughters had 3 daughters. Fina
    14·1 answer
  • HELPPPPL jjdnnskkzzmzmz
    11·1 answer
  • I don’t understand this at all helppp
    9·1 answer
  • Simon used 3 pears and 9 apples to make a fruit salad. What was the ratio of the number of pears to the number of apples in the
    8·1 answer
  • Please answer asap
    13·1 answer
  • Is v = 10 a solution to the inequality
    6·1 answer
  • The work of a student to solve the equation 2(3x − 4) = 8 + 2x + 4 is shown below:
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!