tabiiesanceydianti
tabiiesanceydianti tabiiesanceydianti
  • 12-06-2016
  • Mathematics
contestada

What is the factored form of 125x6 – 8?

(5x2 – 2)(25x4 – 10x2 – 4)
(5x2 – 2)(25x4 – 10x2 + 4)
(5x2 – 2)(25x4 + 10x2 + 4)
(5x2 – 2)(25x4 + 10x2 – 4)

Respuesta :

caylus
caylus caylus
  • 12-06-2016
Hello,

Answer C

(5x²)^3-(2)^3=(5x²-2)((5x²)²+5x²*2+2²)

Answer Link
lisboa lisboa
  • 23-05-2019

Answer:

[tex](5x^2-2)(25x^4 +10x^2+4)[/tex]

Step-by-step explanation:

125x^6 – 8

We write the numbers in exponential form

125= 5*5*5 = 5^3

8 = 2*2*2= 2^3

Now 125x^6 - 8 becomes 5^3x^6 - 3^3

5^3x^2*3- 3^3

[tex](5x^2)^3 - 2^3[/tex]

We got the expression in cube form a^3- b^3= (a-b)(a^2+ab+b^2)

[tex](5x^2)^3 - 2^3[/tex]

a= 5x^2  and b= 2

[tex](5x^2)^3 - 2^3=(5x^2-2)((5x^2)^2- 5x^2 * 2+ 2^2)[/tex]

=[tex](5x^2-2)(25x^4 +10x^2+4)[/tex]

Answer Link

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