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
creativ13 [48]
3 years ago
13

smiddle" class="latex-formula">
solve the equation using any method you prefer. Give imaginary roots.
Mathematics
1 answer:
Mrrafil [7]3 years ago
3 0
5=x^2+2x\\
x^2+2x-5=0\\
x^2+2x+1-6=0\\
(x+1)^2=6\\
x+1=\sqrt6 \vee x+1=-\sqrt6\\
x=-1+\sqrt6 \vee x=-1-\sqrt6
You might be interested in
: Sam is 12 years older than John. For the last four years, Sam and John have been friends. Five years ago, Sam was 5 times as o
Firlakuza [10]

Answer:

The present age of Sam is 20 years .

Step-by-step explanation:

Given as :

Let The age of John =  J years

Let The age of Sam = S years

∵ Sam is 12 years older than John

so,  The age of Sam = 12 + The age of John

i.e S = 12 + J            .....1

<u>Again</u>

Before 5 years ago

The age of Sam = 5 times age of John

So, (S - 5) = 5 × (J - 5)

Or, S - 5 = 5 J - 25

Or, 5 J - S = 25 - 5

Or, 5 J - S = 20                  .........2

Solving eq 1 and eq 2

[5 J - (12 + J)] = 20

Or, 5 J - 12 - J = 20

Or, 4 J = 20 + 12

Or, 4 J = 32

∴ J = \frac{32}{4}

i.e J = 8 years

So, The age of John = J = 8 years

Put The value of J into eq 1

∵ S = 12 + J

So, S = 12 + 8

i.e S = 20 years

So, The present age of Sam = S = 20 years .

Hence, The present age of Sam is 20 years . Answer

7 0
3 years ago
Read 2 more answers
What is the value of x in the equation 3x-1/9y=18, when y=27?
natulia [17]

Hi Vanessa


3x -1/9 (27) =18

3x - 27/9 =18

3x- 3 =18

Add 3 to both sides

3x-3+3=18+3

3x=21

Divide both sides by 3

3x/3= 21/3

x= 7

The value of x is 7


Now let's check if my answer is correct

To check it we gonna replace x by 7 and 27 for y

(3)(7) -1/9 (27) = 18

21 -1/9 (27)=18

21- 27/9 = 18

21- 3 = 18

18 = 18


The answer is good and I hope its help:0

5 0
3 years ago
Help me please<br> thx so much<br> have a good one
Crazy boy [7]
Associative property of multiplication
5 0
3 years ago
Which is greater 1gal or 15c the other questions are 1 mi or 2000 yd and finally 100ft or 100mi
kipiarov [429]
1 gal because there is 16 cups in a gallon
4 0
3 years ago
Read 2 more answers
Another way to write 1/2
earnstyle [38]
½=0.5.................
3 0
3 years ago
Read 2 more answers
Other questions:
  • Please help with this Question, I've been having trouble with. As soon as possible, thanks
    9·1 answer
  • The difference of this equation.
    13·1 answer
  • What is the domain of f(x)?
    11·1 answer
  • The area of a rectangle is 36 square feet. find the length and width if the length is 4 times the width
    10·2 answers
  • What polynomial identity should be used to prove that 16^2=(10+6)^2? (A. Difference of Cubes; B. Difference of Squares; C. Squar
    12·2 answers
  • Find the volume of a cylinder with a diameter of 16 mm and the height of 5.7mm
    8·1 answer
  • Polygon ABCD, shown in the figure, is dilated by a scale factor of 8 with the origin as the center of dilation, resulting in the
    10·2 answers
  • A bank wonders whether omitting the annual credit card fee for customers who charge at least $3,000 in a year would increase the
    6·1 answer
  • I can bake 3/4 of a cake in 5 minutes. How much of the cake canlbake in 1 minute?​
    9·1 answer
  • Help help help help help m at h math math
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!