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# Solve the quadratic equation $12-r-r^2=0$

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##  Final answer to the problem

$r=3,\:r=-4$
Got another answer? Verify it here!

##  Step-by-step Solution 

How should I solve this problem?

• Choose an option
• Solve for r
• Find the derivative using the definition
• Solve by quadratic formula (general formula)
• Simplify
• Find the integral
• Find the derivative
• Factor
• Factor by completing the square
• Find the roots
Can't find a method? Tell us so we can add it.
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Sort the polynomial $12-r-r^2$ in descending order to handle it more easily

$-r^2-r+12=0$

Learn how to solve quadratic equations problems step by step online.

$-r^2-r+12=0$

Learn how to solve quadratic equations problems step by step online. Solve the quadratic equation 12-r-r^2=0. Sort the polynomial 12-r-r^2 in descending order to handle it more easily. Factor the trinomial by -1 for an easier handling. Factor the trinomial -\left(r^2+r-12\right) finding two numbers that multiply to form -12 and added form 1. Rewrite the polynomial as the product of two binomials consisting of the sum of the variable and the found values.

##  Final answer to the problem

$r=3,\:r=-4$

##  Explore different ways to solve this problem

Solving a math problem using different methods is important because it enhances understanding, encourages critical thinking, allows for multiple solutions, and develops problem-solving strategies. Read more

SnapXam A2

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1
2
3
4
5
6
7
8
9
0
a
b
c
d
f
g
m
n
u
v
w
x
y
z
.
(◻)
+
-
×
◻/◻
/
÷
2

e
π
ln
log
log
lim
d/dx
Dx
|◻|
θ
=
>
<
>=
<=
sin
cos
tan
cot
sec
csc

asin
acos
atan
acot
asec
acsc

sinh
cosh
tanh
coth
sech
csch

asinh
acosh
atanh
acoth
asech
acsch

###  Main Topic: Quadratic Equations

The quadratic equations (or second degree equations) are those equations where the greatest exponent to which the unknown is raised is the exponent 2.