Let the number be 'a':
The difference of the square of a number and 4
a^2 -4
is equal to 3 times that number.
= 3*a
a^2 -4 =3a
a^2 -3a -4=0
(a-4) (a+1)=0
solutions are: 4 and -1
Step-by-step explanation:
1-4 just did this\
:D
Plug in D:
-4(1)^2 + 15(1)^2/5
-4 + 15 / 5
-4 + 3 = -1
Answer:
hope you like my answer its-11
For each equation give X a value and solve for Y, do this at least two times for each equation.
Plot those dots on a graph to draw two lines.
The solution is where the two lines cross.
You will see the lines cross at (-1,-2)