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
Novay_Z [31]
3 years ago
7

What is the discriminant of the polynomial below?

Mathematics
2 answers:
oksian1 [2.3K]3 years ago
8 0

Let d = discriminant

d = b^2 - 4ac

Let a = 2, b = 4 and c = -9

We now plug and chug.

d = (4)^2 - 4(2)(-9)

d = 16 - 8(-9)

d = 16 + 72

d = 88

bija089 [108]3 years ago
8 0

Answer:

А. 88

Step-by-step explanation:

2х^2 + 4x - 9

This is in the form

ax^2 +bx +c

where a=2 b=4 and c=-9

The discriminant is

b^2 -4ac

Substituting into the equation

4^2 -4(2) (-9)

16 - (-72)

16+72

88

You might be interested in
Which expression is equivalent to x^4 - 12x^2 + 36?
QveST [7]
So the answer is
(<span>x^2 plus or minus 6)(x^2 plus or minus 6)
an easy way to do this is to only look at plus or minus 6
x^4 <u><em>- 12</em></u>x^2 + <u><em>36   (-12 and 36)
</em></u><em />

<u><em /></u>6 x 6 = 36
<em />6 + 6 </span>≠ -12              (x^2 + 6)(x^2 + 6) is incorrect        
<span><u><em>
</em></u><em><u /></em><u />
6 x -6 </span>≠ 36
<span><em />6 + -6 </span>≠ -12             (x^2 - 6)(x^2 + 6) is incorrect
<span><em /><em>
</em><em />-6 x -6 = 36
<em />-6 + -6 = -12         </span><span>(x^2 - 6)(x^2 - 6) is correct
</span><u><em>
the answer is (1)

</em></u>
3 0
3 years ago
Read 2 more answers
A Teenager can wash two tables per minute write an expression for how many tables they can wash in M minutes
Vikki [24]
The answer to this problem is 2m
3 0
3 years ago
Janice swam in the 400​ ___ backstroke.
ruslelena [56]
Meter/ yard. Likely meter since that is high/college standard
7 0
3 years ago
If 400 reduced by two times my present age is 296, how old am I now?
vitfil [10]

Answer:

52 years.

Step-by-step explanation:

Represent my current age by c.  Then 400 - 2c = 296, or

104 = 2c

Then c must be 104/2, or 52 years.

4 0
3 years ago
What is a parallel slope for the line y = 2x + 2?
ArbitrLikvidat [17]

Answer: 2

Step-by-step explanation:

The slope is equal to 2 by it being in the slope place of y=mx+b

5 0
3 years ago
Other questions:
  • Angle b is a supplement of angle a and measure angle a = 65.2 degrees. find measure angle b
    15·1 answer
  • PLEASE HELP A flight across the US takes longer east to west then it does west to east. This is due to the plane having a headwi
    15·1 answer
  • The pottery class has 14 pounds of clay. Each student got 1/3 of a pound of clay to make a plate. How many plates did the studen
    12·2 answers
  • Gasoline prices for the first six months of 2004 are shown in the table below. Using a logarithmic model, what is the best
    13·1 answer
  • How are the concepts of markup and markdown related to the percent equation?
    8·2 answers
  • It takes Serina 0.25 hours to drive to school. Her route is 16 km long. What is Serina’s average speed on her drive to school?
    11·1 answer
  • X&gt;= -5 and y&gt;= -3 draw a graph with the following domain and range restrictions.
    9·1 answer
  • The point on the graph is<br>r=(-3,4)<br>s=(3,-1)<br>T=(-2,-3)<br>​
    7·2 answers
  • 1) Find the ending balance after these transactions: Transactions: A. Your
    12·1 answer
  • 5 ft, 6 ft, 12 ft<br> Do these side lengths form an enclosed triangle?<br> Choose (YES or NO)
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!