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
Find the value of x. Then find the missing angle measures of the polygon
UkoKoshka [18]

Answer:

x=10

5x=50

2x=20

Step-by-step explanation:

110+5x+2x = 180  combine like terms and move the constants to the same side

7x=70

x = 10

5(10) = 50

2(10) = 20

4 0
3 years ago
The ratio of green marbles to yellow marbles in Naafay's bag is equal to 2:3. What percent of the marbles in the bag are green m
mina [271]
It is 80%  just writing random things so it can be 20 words
7 0
3 years ago
Please help me answer this before 8:00
alisha [4.7K]
The answer to 392,196=4,508
8 0
3 years ago
Read 2 more answers
the number of subscriptions to an interior design magazine was 16,450 in 1996. Since then, the number of subscriptions has incre
babunello [35]

Answer:

49,744.8 so round up to 49,745

Step-by-step explanation:

4 0
3 years ago
What does the graph of lnx look like?
qwelly [4]
This is what the graph of in(x) looks like

7 0
3 years ago
Other questions:
  • Vance ate a salad and Four-fifths of a turkey burger for dinner. The salad contained 80 calories and his entire meal contained 4
    5·2 answers
  • kelly made one batchof peanut and pretzal snack mix. how many grams does she need to add to the snack mix to make 2 kilograms
    5·1 answer
  • What is the function rule for the line
    8·1 answer
  • To find the distance AB across a river, a distance BC of 415 m is laid off on one side of the river. It is found that B = 112.2°
    10·1 answer
  • I need help please ​
    5·1 answer
  • How many groups of of 5/6 are in 1
    5·1 answer
  • HELP PLZZZZZ
    12·1 answer
  • Find the surface area of the prism please help fast
    13·1 answer
  • Solve each of the following equations <br> 1)x+8-15
    8·1 answer
  • Can you please help me with this?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!