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DiKsa [7]
3 years ago
15

Find the value of the polynomial 5x – 4x^2 + 3 at x = 2 and x = –1​

Mathematics
2 answers:
Andrew [12]3 years ago
7 0

Answer:

x=2 => 5×2 - 4×2² + 3 = 10-16+3 = -3

x=-1 => 5×-1 - 4×(-1)² + 3 = -5 - 4 + 3 = -6

Step-by-step explanation:

is in the answer.

remember that squaring a negative number creates a positive result.

aliya0001 [1]3 years ago
6 0

Answer:

Let the polynomial be f(x) = 5x – 4x^2 + 3

Now, for x = 2,

f(2) = 5(2) – 4(2)^2 + 3

=> f(2) = 10 – 16 + 3 = –3

Or, the value of the polynomial 5x – 4x^2 + 3 at x = 2 is -3.

Similarly, for x = –1,

f(–1) = 5(–1) – 4(–1^)2 + 3

=> f(–1) = –5 –4 + 3 = -6

The value of the polynomial 5x – 4x2 + 3 at x = -1 is -6.

Answered by GAUTHMATH

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VladimirAG [237]

Answer:

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5 0
2 years ago
Every year Ethan earns $38428each year he spends $ 21728 on exspenses how much she he have left over
astraxan [27]

Answer:

$16,700

Step-by-step explanation:

Subtract: 38428

               <u>-21728</u>

                16700

You will need to add 10 to the hundred's place by subtracting 1 from the thousandth's place: 37,4(+10)28.  Then you subtract as usual.

8 0
3 years ago
Help me plz 8th grade math need answers quick
mixer [17]

Answer:

25. Not a solution

26. Yes a solution

27. y= 2/3 x

28. y=3x+16

Step-by-step explanation:

25. The solution to a linear equation is the point (x,y). To find if an (x,y) is a solution, substitute it into the equation and see if it works.

y=4x-4 and (8,3)

3=4(8)-4

3=32-4

3=28

False

Not a solution.

26. Repeat 25 to solve 26 with y=5x-5 and (0,-5)

y=5x-5 and (0,-5)

-5=5(0)-5

-5=0-5

-5=-5

True

Yes a solution.

27. This line crosses through the origin is proportional and therefore has the form y=mx. It also has a gentle slant meaning that is less than 1/2 and goes in a positive direction. This means it is y=2/3 x.

28. Use inverse operations to rearrange the equation.

y-3x=16

y=16+3x

y=3x+16

8 0
3 years ago
Three times a number is 4 more than twice the number
Gelneren [198K]

Answer:

3n = 2n + 4

Step-by-step explanation:

That is that as an equation.

5 0
2 years ago
Please help me, I don’t wanna fail..
balandron [24]
The answer is 8.7 cm
8 0
3 years ago
Read 2 more answers
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