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3 years ago

NEED HELP. WILL MARK BRAINLIST. DO NOT SPAM

Mathematics

1 answer:

Tcecarenko [31]3 years ago

5 0

Answer:

a) x = {-2, 1, 3} are the zeros

b) y = (x +2)(x -1)(x -3)

c) y = x^3 -2x^2 -5x +6

Step-by-step explanation:

a) The zeros are the values of x where the graph crosses y=0. Those values are x = -2, x = 1, x = 3.

b) If "a" is a zero, then (x-a) is a factor. The factored polynomial is ...

y = (x +2)(x -1)(x -3)

c) This can be multiplied out using the distributive property several times.

y = (x +2)(x(x -3) -1(x -3))

= (x +2)(x^2 -3x -x +3)

= (x +2)(x^2 -4x +3)

= x(x^2 -4x +3) +2(x^2 -4x +3)

= x^3 -4x^2 +3x +2x^2 -8x +6

y = x^3 -2x^2 -5x +6

_____

The supplied graph apparently scales this vertically by a factor of 1/2, since its y-intercept is at (0, 3), not (0, 6).

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3 years ago

The perimeter of a parallelogram is 15.42 cm. The length of its sides is 2.93. What isthe lengths of its other sides?

KATRIN_1 [288]

Paaralellogram has 2 pairs of paralell sidess
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3 years ago

How many significant figures are there in the number 31.6901? A. 6 B. 4 C. 3 D. 5

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3 years ago

Read 2 more answers

How many extraneous solutions does the equation below have? StartFraction 9 Over n squared 1 EndFraction = StartFraction n 3 Ove

BigorU [14]

The equation has one extraneous solution which is n ≈ 2.38450287.

Given that,

The equation;

$\dfrac{9}{n^2+1} =\dfrac{n+3}{4}$

We have to find,

How many extraneous solutions does the equation?

According to the question,

An extraneous solution is a solution value of the variable in the equations, that is found by solving the given equation algebraically but it is not a solution of the given equation.

To solve the equation cross multiplication process is applied following all the steps given below.

$\rm \dfrac{9}{n^2+1} =\dfrac{n+3}{4}\\\\9 (4) = (n+3) (n^2+1)\\\\36 = n(n^2+1) + 3 (n^2+1)\\\\36 = n^3+ n + 3n^2+3\\\\n^3+ n + 3n^2+3 - 36=0\\\\n^3+ 3n^2+n -33=0\\$

The roots (zeros) are the x values where the graph intersects the x-axis. To find the roots (zeros), replace y

with 0 and solve for x. The graph of the equation is attached.

n ≈ 2.38450287

Hence, The equation has one extraneous solution which is n ≈ 2.38450287

For more information refer to the link.

brainly.com/question/15070282

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3 years ago

(Multiple Choice, 20 pts)

ivanzaharov [21]

Answer:

x = -3, x = 0 is a extraneous solution

Step-by-step explanation:

Step 1: Cross-multiply

3x² = 4x² + 3x

Step 2: Isolate <em>x</em>'s

0 = x² + 3x

Step 3: Factor

0 = x(x + 3)

Step 4: Find roots

x = 0, -3

Step 5: Double check work

Plug in both to see if they both work. Only x = 0 should be extraneous. We now have our answer!

3 0

3 years ago