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Solve the quadratic equation $x^2-3x-8=0$

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Solution

Formulas

Videos

Algebra 2 - Learn how to complete the square to solve a quadratic, x^2 - 14x + 19 = 0

https://www.youtube.com/watch?v=xRlis69-HA0

Applying the difference of two squares with fractions, (1/4)x^2 - (1/4)

https://www.youtube.com/watch?v=iCJqYiruM98

Solving quadratic equations by square roots | Algebra II | Khan Academy

https://www.youtube.com/watch?v=55G8037gsKY

Solving a natural logarithmic equation using the quadratic formula

https://www.youtube.com/watch?v=Nf87n5ro_J4

Algebra 2 - Learn how solve a quadratic by completing the square with fractions, x^2 + 3x + 6 = 0

https://www.youtube.com/watch?v=KWBr5zM3tXs

Algebra 2 - Solving a factored quadratic equation using the zero product property, -x(3x + 5) = 0

https://www.youtube.com/watch?v=3on6rsKoK_k

Function Plot

Plotting: $x^2-3x-8$

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7
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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
D□x
∫
∫◻
|◻|
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

How to improve your answer:

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Main Topic: Quadratic Formula

In elementary algebra, the quadratic formula is the solution of the quadratic equation. There are other ways to solve the quadratic equation instead of using the quadratic formula, such as factoring, completing the square, or graphing. Using the quadratic formula is often the most convenient way.

Used Formulas

See formulas (1)

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