What is the value of b2 - 4ac for the following equation? 2x2 + 3x = -1

2 answers:

7 0

The value of b^2-4ac is known as the discriminant of a quadratic function, and can tell you how many roots exist of this function depending on what it is equal to.

Start by moving the -1 to the other side, as we need this function to equal zero.

2x^2 + 3x + 1 = 0

This is now the standard form ax^2 + bx + c = 0. Plug each value that corresponds into the discriminant equation.

b^2-4ac
(3)^2 - 4(2)(1)
9 - 8
1

The value of the discriminant is 1, meaning that two real roots exist for the function described.

grandymaker [24]3 years ago

5 0

Answer:

Step-by-step explanation:

You might be interested in

I really don’t understand this please help!!

Yuliya22 [10]

H=√d^2-w^2
=√146.4 1-92.16
=7.3 inches
the principle used here is pythagoras theorem
all the best.

6 0

2 years ago

Factor this completely thank you

jeka94

4(2x raise to power 2-4-7x)

3 0

2 years ago

Which phrase represents the algebraic expression 5x-9

Gre4nikov [31]

the product of five times a number and nine the difference of nine times a number and five the sum of five times a number and five the difference of five times a number and nine

6 0

3 years ago

Read 2 more answers

Consider right triangle MNO below which expression represents the length of side MN

azamat

Answer:

I can help you via Watsapp

5 0

2 years ago

A plane traveled 460 mph with the wind and 400 mph against the wind. Find the speed of the plane in still air and the speed of t

Fudgin [204]

Let's say the speed of the plane is "p", and the speed of the wind is "w".

when the plane goes with the wind, is not really going "p" mph fast, is really going "p + w" mph fast, because the wind is adding speed to it.

likewise when the plane is going against the wind, is also not going "p" fast is going "p - w" mph fast. Therefore,

$\bf \begin{cases}
p+w=460\implies \boxed{w}=460-p \\
p-w=400\\
----------\\
p-\left( \boxed{460 - p} \right)=400
\end{cases}
\\\\\\
2p-460=400\implies 2p=860\implies p=\cfrac{860}{2}\implies p=430$

7 0

3 years ago