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
cricket20 [7]
3 years ago
12

What times what equals 12 but when you add those numbers together it equals 3

Mathematics
1 answer:
wel3 years ago
4 0
So, we can write it like this:

x+y=3
x*y=12
from the first we know that
x+y=3
y=3-x

so:

x*y=12 can be written as:
x*(x-3)=12

so x^2-3x=12

Actually this equation does not have a solution within the real numbers

but we can calculate:

x^2-3x-12=0

and if we use the quadratic formula, we will have:

(remember the quadratic formula is the following, where for us a=1,b=-3 and c=-12)

\frac{-b- \sqrt{b*b-4a*c} }{2a}
\frac{3- \sqrt{3*3-4*(-12)} }{2} = \frac{3- \sqrt{9+48} }{2} = \frac{3- \sqrt{57} }{2}


So this would be the solution, where the other number would be
3-\frac{3- \sqrt{57} }{2}= \frac{6}{2}-\frac{3- \sqrt{57} }{2}=\frac{3- \sqrt{57} }{2}

The other solution would be the following one;

x=\frac{3+\sqrt{57} }{2}, y=1\frac{1+\sqrt{57} }{2}






You might be interested in
Mr. Schwartz builds toy cars. He begins the week with a supply of 85 wheels, and uses 4 wheels for each car he builds. Mr. Schwa
Mazyrski [523]

136000 is the answer

5 0
3 years ago
Which is greater 4 ft 7 inches or 56 inches
jok3333 [9.3K]
1 ft = 12 in.
4 ft = 4 * 1 ft = 4 * 12 in. = 48 in.

4 ft 7 in. = 48 in. + 7 in. = 55 in.

4 ft 7 in. < 56 in.
8 0
3 years ago
Read 2 more answers
Which of the numbers below are exactly divisable by 9?<br>A)115<br>B)504<br>C)968<br>D)646<br>E)882
WINSTONCH [101]
Okay. So in order to solve this problem, we really have to try out each answer and divide it by 9. A is not correct, because it does not divide evenly. B works, but let's check the others. C and D do not work, but E also works as well. If you can have two answers, 504 and 882 are both exactly divisible by 9. The answers are B: 504 and E: 882.
4 0
3 years ago
Read 2 more answers
PLEASE HELP ME.What letter should appear next in the sequence? V,T,S,R
Molodets [167]

Answer:

in what sentence all i see is the letters no image above

8 0
3 years ago
Use the flowchart to determine whether the opposites of the numbers
icang [17]
The flow chart determine that the answer is 9
7 0
3 years ago
Other questions:
  • How many centimeters are in 740.2
    12·2 answers
  • What is the value of x in this equation?<br> -4x+8=42
    6·2 answers
  • Joe buys a set of books that cost $45.58. He gives the cashier three (3) $20 bills and three (3) pennies. How much change should
    8·2 answers
  • Round off 42,680 to the nearest 1,000
    12·1 answer
  • Use the quadratic formula to solve the equation x2+7x​
    13·1 answer
  • ________ is a mathematical sentence written with a greater than
    8·1 answer
  • Which inequality is true?
    8·2 answers
  • Find the volume of the cone
    9·1 answer
  • A Donut Shop serves plain and chocolates donuts at a ratio of 5 to 3. Based on this ratio, how many chocolate donuts will be ser
    10·1 answer
  • What value of a make the equation 14-a=19-12
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!