The function f(x) = 2x2 + 3x + 5, when evaluated, gives a value of 19. What is the function’s input value?

1 answer:

4 0

F(x)......ur output = 19

19 = 2x^2 + 3x + 5
2x^2 + 3x + 5 - 19 = 0
2x^2 + 3x - 14 = 0
(2x + 7)(x - 2) = 0

2x + 7 = 0
2x = -7
x = -7/2

x - 2 = 0
x = 2

I believe there is 2 possible answers......x (ur input value) = -7/2 or 2

You might be interested in

Two sides of a triangle have sides 11 and 16. The length of the third side must be greater than

postnew [5]

Answer:

Step-by-step explanation:

7 0

3 years ago

The lengths of the diagonals of a rhombus are 18 cm and 24 cm. What is its perimeter and what is the distance between the parall

SpyIntel [72]

Try this option:
note, that distance between the parallel sides is shown via formula of area.
If it is possible, check the arithmetic.

5 0

4 years ago

Read 2 more answers

Question 20 (5 points)

Monica [59]

Well A seems like the most correct answer, the actual purpose of an afterburner is to inject fuel directly into the exhaust stream to increase thrust by as much as 50%. It’s usually used to go supersonic

4 0

3 years ago

Two months ago, the price, in dollars, of a cell phone was c.

laiz [17]

Answer:

c × 0.90

Step-by-step explanation:

c × 0.90, would be your answer because 10% is equal to 0.10, then you would subtract the 0.10 (10%) by 1 (100%), then multiply c times the 0.90 that you get, to get the decreased number, because you're multiplying by a decimal

5 0

2 years ago

Questione Simplify Cosa + 2Cos(a +240")

melamori03 [73]

Step-by-step explanation:

$\cos(a) + 2 \cos(a + 240)$