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
White raven [17]
2 years ago
9

Solve the equation by completing the square 5x(x+6)=-50

Mathematics
1 answer:
motikmotik2 years ago
3 0
First lets distribute the 5x 
5x^2 + 30x = -50

Lets divide every term by 5 
x^2 + 6x = -10 

To complete the square we have to half the b value, which in this case is 6. Then square it. 
Half of 6 is 3, 3 squared is 9 

Add that to both sides of the equation 
x^2 + 6x + 9 = -1 

Find the binomial squared
(x+3)^2 (If you're wondering how i got that please comment) 

(x+3)^2 = -1 

Take the square root of the equation of both sides
(x+3) = +/- i
x = -3 +/- i
x = -3 - i
and 
x = -3 + i


You might be interested in
WHATS THE ANSWER?? answer ASAP NO FILE
Angelina_Jolie [31]

Answer:

a

Step-by-step explanation:

it is a because the shape is moving to the side

3 0
2 years ago
Read 2 more answers
Solve the system of two equations 2y=8 and 15y=2x-4
damaskus [11]
To find y, divide the first equation by 2.
  y = 4

To find x, use that value for y in the second equation. Add 4, then divide by 2.
  15·4 = 2x -4
  60 +4 = 2x
  64/2 = x = 32

The solution is (x, y) = (32, 4).

8 0
3 years ago
My cupcake recipe makes 12 cupcakes and requires 3/2 sticks of butter. I can only buy whole sticks of butter. How many whole sti
Alex
We find out the ratio 100: 12= 25/3
We need the number of <span>sticks of butter: 25/3 x 3/2= 25/2=12.5
That means you must buy 13 </span><span>sticks of butter
Have fun</span>
3 0
3 years ago
Which statement is true about the graph of two lines y=-6 and x=1/6
Gelneren [198K]
The graph of the line y = -6 is a horizontal line which passes through the y axis at -6. On the other hand, the graph of the equation, x = 1/6 is a vertical line that passes through the x-axis at 1/6. The intersection of these lines is at a point that is expressed as (1/6, -6). 
7 0
2 years ago
Washing powder cost 12.87 for 9 kg. hwo much does 1 kg cost to the nearst cent
Goryan [66]

Answer:

hard

Step-by-step explanation:

I don't know because I have never learnt these things

5 0
2 years ago
Read 2 more answers
Other questions:
  • John decided to look at new and used cars. John found a used car for $15000. A new car is $25000, so what percent of thi e price
    10·1 answer
  • Which expression shows the prime factorization of 100
    8·1 answer
  • Solve for t.<br><br>3/4t = 1/4
    12·1 answer
  • What is the approximate side length of the square?
    7·1 answer
  • (f- g)(x) =<br> A. x2 + x-4<br> B. x2 + x + 4<br> C. 12- X+6<br> D. x2+x+6
    12·1 answer
  • On Monday it rained two and one-half inches. On Tuesday it rained three and three-fourths inches. How much did it rain in the tw
    10·1 answer
  • 16. In the expression a+2a-12c^2, a, 2b, and -12c2 are examples of
    15·1 answer
  • Write the set using the roster method A={a|a an even number and 15&lt; a&lt; =25}
    11·1 answer
  • Give letter answer if you give equations rewritten I will give extra points :)
    9·1 answer
  • Complete the sentence.<br><br> Forty-five percent of 120 is <br> .
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!