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
iris [78.8K]
3 years ago
14

Solve each equation by completing the square r² = –12r - 35​

Mathematics
1 answer:
Fittoniya [83]3 years ago
7 0

Answer:

r = - 7, r = - 5

Step-by-step explanation:

Given

r² = - 12r - 35 ( add 12r to both sides )

r² + 12r = - 35

To complete the square

add ( half the coefficient of the r- term )² to both sides

r² + 2(6)r + 36 = - 35 + 36

(r + 6)² = 1 ← take the square root of both sides )

r + 6 = ± 1 ( subtract 6 from both sides )

r = - 6 ± 1, thus

r = - 6 - 1 = - 7 or r = - 6 + 1 = - 5

You might be interested in
Kira solved the equation in the following way. 7 2 − 2x = 11 2 7 2 − 7 2 − 2x = 11 2 − 7 2 −2x ÷ −2 = 4 2 ÷ − 2 x = −1 Describe
vladimir2022 [97]

Answer:

the first step is to use the

✔ Subtraction

property of equality to combine the constant terms.

The second step is to use the

✔ Division

property of equality to isolate the variable

Step-by-step explanation:

edge 20 20

7 0
3 years ago
Read 2 more answers
Which of the following statements is the best definition of a triptych?
slega [8]
It might be a. A painting on three panels. I am not sure, so don't blame me if I get it wrong.
8 0
3 years ago
What is the circumference of the circle shown below?
pshichka [43]

Answer:

A. 25.12 meters

..........

4 0
3 years ago
Read 2 more answers
Monica bowled three games. Her scores were 175, 142, and 133. What was her mean, or average, score
forsale [732]

Answer:

Her average score is 150

Step-by-step explanation:

You add 175+142+133 and divide it by 3

To find mean or average you add up all the numbers and divide by how many numbers there are

3 0
3 years ago
Read 2 more answers
Goran rented a truck for one day. There was a base fee of $19.99 , and there was an additional charge of 94 cents for each mile
nekit [7.7K]
138.43-19.99=118.44
118.44/0.94=126.

Hope this helps :)
6 0
3 years ago
Other questions:
  • What’s the perimeter of the square in inches
    14·1 answer
  • A woman has 14 different shirts: 10 white shirts and 4 red shirts. If she randomly chooses 2 shirts to take with her on vacation
    12·1 answer
  • To increase an amount by 3% what single multiplier would you use?
    8·1 answer
  • Which value must be added to the expression x2 + 12x to make it a perfect-square trinomial?
    6·2 answers
  • Which equation describe the line through the points (2,-4) and (5,8)
    10·1 answer
  • If a wagon train traveled 12.5 miles each day, how many days would it take
    9·1 answer
  • A box contains 6 plain pencils and 2 pens. A second box contains 3 color pencils and 5 crayons. One item from each box is chosen
    8·1 answer
  • 1) 4+8r-6r=6+2r<br> 2) 1-3x=-6+7-2x-x
    13·1 answer
  • 50 BRAINLY POINTS 3. A savings account is started with an initial deposit of $2400. The account earns 6% interest compounded ann
    11·1 answer
  • If gasoline costs $ 3.77 per gallon when you pay with a credit card, but $0.08 per gallon less if you pay with cash, how much do
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!