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Deffense [45]
3 years ago
15

if the zeroes of the polynomial, p(x)= ax^3 + 3bx^2 + 3cx + d = 0 be alpha - beta, alpha and alpha + beta. Prove that 3abc = a^2

d + 2b^3 ...please do mention step by step...and explain the process​..
Mathematics
1 answer:
swat323 years ago
7 0

Step-by-step explanation:

p(x) = ax³ + 3bx² + 3cx + d

Roots are α−β, α, and α+β.

The sum of the roots of a cubic y = ax³ + bx² + cx + d is -b/a.  Therefore:

α−β + α + α+β = -3b/a

3α = -3b/a

α = -b/a

α is a root, so p(α) = 0.

0 = a(α)³ + 3b(α)² + 3c(α) + d

Substitute α = -b/a:

0 = a(-b/a)³ + 3b(-b/a)² + 3c(-b/a) + d

0 = -(b³/a²) + 3b³/a² − 3bc/a + d

0 = -b³ + 3b³ − 3abc + a²d

0 = 2b³ − 3abc + a²d

3abc = 2b³ + a²d

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What percent of 32 is 48?<br><br> A.67<br> B.46<br> C.33<br> D.none of above
elena55 [62]

Just by giving the numbers an analisys, we are able to find the answer, specially because we have options to choose from.

32 is a big part of 48. It's more than half, which would be 24 and would correspond to 50%. Therefore, nor 46 nor 33 can be answers, because 32 is more than the half of 48, so the answer is A.



Hope it helped,



BioTeacher101


5 0
3 years ago
Read 2 more answers
Mo’s farm stand sold a total of 165 pounds of apples and peaches. She sold apples for $1.75 per pound and peaches for $2.50 per
9966 [12]

Answer: 65 pounds of Peaches were sold.

Step-by-step explanation:

Let the number of pounds of  Peaches sold                  = X pounds

Therefore the pound of apple sold                                 = (165 - X ) pounds

Total pounds of apple and peaches sold                       = 165 pounds

Sale made on Peaches at the cost of $2,50 per Peache = $2.50X

sale made on apple sold at the cost of $1.75 per apple  = $1.75(165 - x )

Total sale made on the sale of both Peaches and apple = $337.50

Therefore , open the bracket, add everything together and equate to the total sale made which is $337.50

 we now have

  2.50x + 1.75( 165 - x ) = 337.50

  2.50x + 1.75 x 165 - 1.75x = 337.50

  2.50x + 288.75 - 1.75x = 337.50

collect like terms

2.50x - 1.75x = 337.50 - 288.75

           0.75x = 48.75

divide through by the coefficient of x which is 0.75

                   x = 48.75/0.75

                      = 65pounds .

Therefore, Mo's farm sold 65 pounds of Peaches.

Check ;

  65 x 2.50 = $162.5

   subtract 65 from 165 to get the pound of the appel

   165 - 65 = 100 pounds of apple was sold.

 now multiply 100 x 1.75

                  = $175

Now add the two together to give the total sale ,

                $162.5 + $175  = $337.50.

 

                           

4 0
3 years ago
Turn 14/6 into a mixed number
Masteriza [31]

2 \frac{2}{6}is the mixed fraction of \frac{14}{6}

7 0
4 years ago
Read 2 more answers
Someone answer this please!
Savatey [412]

B.) Square

I used Math-way for this answer cause if you type in the following points it is shown to be a square..

I hope this helps!

3 0
4 years ago
Please help with geometry question
Hunter-Best [27]

Answer:

m∠J = 45° , m∠I = 45° and m∠M = 90°

And the ΔJIM is an isosceles right angled triangle.

Step-by-step explanation:

(a). In ΔJIM,

∠J = 2x + 15,

∠I = 5x - 30, and

∠M = 6x

Now, using angle sum property of a triangle that sum of all the angles in a triangle is 180°

⇒ ∠J + ∠I + ∠M = 180°

⇒ 2x + 15 + 5x - 30 + 6x = 180°

⇒ 13x -15 = 180°

⇒ 13x = 195

⇒ x = 15

Therefore, m∠J = 45° , ∠I = 45° and m ∠M = 90°

(b). Now, ΔJIM is a right angled triangle right angled at M.

Also, ∠J = ∠I = 45°

So, JM = IM ( because in a triangle sides opposite to equal angles are equal)

So, ΔJIM is an isosceles triangle because its two sides are equal.

Hence, ΔJIM is a right angled isosceles triangle right angled at M.

8 0
3 years ago
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