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
lana [24]
2 years ago
14

2x2 – 9x + 2 = –1

Mathematics
1 answer:
Reika [66]2 years ago
5 0

Answer:

C)  The discriminant is greater than 0, so there are two real roots

Step-by-step explanation:

<u>Discriminant</u>

b^2-4ac\quad\textsf{when}\:ax^2+bx+c=0

\textsf{when }\:b^2-4ac > 0 \implies \textsf{two real roots}

\textsf{when }\:b^2-4ac=0 \implies \textsf{one real root}

\textsf{when }\:b^2-4ac < 0 \implies \textsf{no real roots}

2x^2-9x+2=-1

\implies 2x^2-9x+3=0

\implies a=2, b=-9, c=3

\begin{aligned}b^2-4ac &=(-9)^2-4(2)(3)\\& =81-24\\&=57 > 0\implies \textsf{two real roots}\end{aligned}

You might be interested in
1) 8(4w - 5) =<br>2) 7 (-35 - 6) -<br>can you help me solve these​
tankabanditka [31]
1) 32w -40
2) -275

Lmk if it helped you
7 0
3 years ago
Read 2 more answers
Solve for w.<br> 40+4w=12w
Xelga [282]

Answer:

W=5

Step-by-step explanation:

40+4w=12w

-4w -4w

40= 8w

÷8 ÷8

5=w

7 0
3 years ago
Hey guys whats a good calculator to get for maths
kirill [66]

Answer: CasioFX-CG50

Step-by-step explanation:  you can get it on amazon

7 0
2 years ago
Solve the proportion x/12.6=45/63
NNADVOKAT [17]

Answer:

x = 9

Step-by-step explanation:

solve using cross multiplication

63(x) = 45(12.6)

63x = 567

x = 9

5 0
3 years ago
Read 2 more answers
Graph the linear equation y= -3x using the slope and y intercept 7th grade middle school math pls answer fast this is due soon
ehidna [41]

Answer: graph -3 on the y axis which is the line going straight up and down and then go up one, and then to the right one and graph that point. keep on going up one and to the right one.

Step-by-step explanation:

3 0
3 years ago
Other questions:
  • Michael has saved $22.40. Kevin saved 3/4 of the amount that Michael saved. Jack saved 5 times as much as Kevin. What is the tot
    15·2 answers
  • How many seconds are there in (a) one hour and thirty-five minutes and (b) one day?
    7·1 answer
  • Which points lie on the line y = 3x - 7?
    6·1 answer
  • What is the value of g(−3) when g(x)=2x−2 ?
    6·1 answer
  • What is the value of x in the figure above? ^^
    15·1 answer
  • Margaret uses 1 3/4 teaspoon of vanilla to make 12 vanilla cupcakes. She wants to make 30 cupcakes. How much vanilla will Margar
    14·2 answers
  • Will the answer to this expression be POSITIVE or NEGATIVE?<br><br> - 1 - (-6.5)
    11·1 answer
  • 18.
    10·2 answers
  • Plz plz plz help me no links but PLZ ANYTHING
    6·1 answer
  • Liz decides to save money to buy an electric car. She invests $500 every 6 months at
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!