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Troyanec [42]
3 years ago
12

F (x) = -3x + 5x2 + 8 has roots.

Mathematics
2 answers:
Bumek [7]3 years ago
6 0

it has no root

first make it common quadratic form

y = 5x² - 3x + 8

we take

a = 5

b = -3

c = 8

the to prove it doesn't have root. we using discriminant

D = b² - 4ac

D = (-3)² - 4*5*8

D = 9 - 160

D = - 151

D > 0 means the equation has 2 roots

D = 0 means the equation has 1 root

D < 0 do not have root because it doesn't have intercept on x-axis

Anon25 [30]3 years ago
4 0

Answer:

f (x) = -3x + 5x2 + 8 has  2  roots.

2 is the answer

Step-by-step explanation:

on edge

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Algebraic expression for 8+6q+q
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Read 2 more answers
Question 9 of 15 (1 point)
mote1985 [20]

The number is -9

Step-by-step explanation:

Let x be the number then according to given statement

4x+10 = x-17

Subtracting 10 from both sides

4x+10-10 = x-17-10\\4x = x-27

Subtracting x from both sides

4x-x = x-x-27\\3x = -27

Dividing both sides by 3

\frac{3x}{3} = \frac{-27}{3}\\ x = -9

<u>Verification:</u>

4(-9)+10 = -9-17\\-36+10=-26\\-26=-26

The number is -9

Keywords: Linear equation, variables

Learn more about linear equation at:

  • brainly.com/question/4767370
  • brainly.com/question/4770453

#learnwithBrainly

7 0
2 years ago
You purchase 5 pounds of apples and 2 pounds of oranges for $9.Your friend purchases 5 pounds of apples and 6 pounds of oranges
babymother [125]

Answer:

x = 1 and y = 2

Step-by-step explanation:

Let apples are represented by x

and let oranges are represented by y

You purchase 5 pounds of apples and 2 pounds of oranges for $9. This line in equation format can be written as:

5x + 2y = 9

Your friend purchases 5 pounds of apples and 6 pounds of oranges for $17.

This line in equation format can be written as:

5x + 6y = 17

Now we have two equations:

5x + 2y = 9 -> eq (i)

5x + 6y = 17 -> eq(ii)

We can solve these equations to find the value of x and y.

Subtracting eq(i) from eq(ii)

5x + 6y = 17

5x + 2y = 9

-     -         -

_________

0+4y= 8

=> 4y = 8

y= 8/4

y = 2

Now, putting value of y in eq (i)

5x + 2y = 9

5x +2(2) = 9

5x +4 = 9

5x = 9-4

5x = 5

x = 1

so, x = 1 and y = 2

8 0
3 years ago
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