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S_A_V [24]
4 years ago
9

How do you find the sum of cube ?

Mathematics
1 answer:
SIZIF [17.4K]4 years ago
4 0

Answer:

(2x+5)(4x^{2} -10x+25)=0

Step-by-step explanation:

Given:

The given equation is.

8x^{3} +125=0

Find the some of cube.

Solution:

8x^{3} +125=0

2^{3}x^{3} +5^{3}=0

(2x)^{3} +5^{3}=0----------(1)

The sum of the cube formula is given below.

(a^{3} +b^{3})=(a+b)(a^{2} -ab+b^{2} )-----------(2)

By comparing equation 1 and equation 2

a=2x, b=5

substitute a and b value in equation 2

((2x)^{3} +5^{3})=(2x+5)((2x)^{2} -(2x)(5)+5^{2})

((2x)^{3} +5^{3})=(2x+5)(4x^{2} -(10x)+25)

((2x)^{3} +5^{3})=(2x+5)(4x^{2} -10x+25)

Therefore the sum of the cube (2x+5)(4x^{2} -10x+25)=0

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Yes help me please i need
kow [346]
The correct answer is C and E



Explain

A. 8x+4x=0

Now simply it

12x = 0

Now divide by 12 on both both side

X= 0

So this equation has the solution x= 0


B. 6x+2 = 4x+2+2x

Now both sides

6x+2=6x+2
Now simply by 6x+2 both sides

X= 0

So this equation has infinity solution


C. 4x-8x-3=6-4x

Now simply both sides

-4x-3=6-4x

Now simply

-3x=6

This equation have no solution


D. 5x+1 =1-5x


Now add 5x-1 on both sides


10=0
Now divide by 10

X= 0

This equation have solution x= 0


E. 12x-3-5x = 9+7x-6

Now simply both sides

7x-3= 7x+3

And subtract 7x from both sides

-3 = 3

So the equation has no solution


I hope this help you :D

Good luck



8 0
4 years ago
22 - 3 × 6 + 5^2<br> A.<br> 38<br> B.<br> 139<br> C.<br> 29<br> D.<br> 65
baherus [9]

Answer:

C. 29

Step-by-step explanation:

  • 22 - 3 × 6 + 25
  • 22 - 18 + 25
  • 4 + 25
  • 29
6 0
3 years ago
the length of a rectangle is 4cm longer than the width. the perimeter is 80cm. find the length and the width.
skelet666 [1.2K]

Answer:

I think it is 20cm

Step-by-step explanation:

divide 80 by 4 =20 cm

7 0
3 years ago
Answers choices are t is less than 82.
vodomira [7]

Answer:

The correct choice would be greater than or equal to 82

Step-by-step explanation:

If tickets are sold for 4 dollars and 82 tickets are sold than you have 328 dollars 328 plus the 72 from the bake sale is 400 equal you also must take into account that more people might buy tickets but the bare minimum would be 82 so greater than or equal to is the correct choice

4 0
3 years ago
Can anybody help me with this problem in math ? asap .
Charra [1.4K]

Answer:

im pretty sure it's either vertical or linear. sorry thats the best i can do

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
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