Question

125 – 8x^3 Urgent how to do polynomials.

Answer 1

$<b>Heya mate. (^_-). Solution below.$
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$<u>Your Question -</u>$

Factorise the polynomial 125 - 8x³

$<u>Solution -</u>$

125 - 8x³

We can write it as

125 - 8x³

= (5)³ - (2x)³

Let 5 = "a" and 2x = "b"


Now, using the identity ---
(a³ - b³) = (a - b) (a² + ab + b²)

Putting the values of a and b

5³ - 2x³

= [5 - 2x] [(5)² + (5 × 2x) + (2x)²]

= (5 - 2x) (25 + 10x + 4x²)

$<marquee>Hence, (125 - 8x³) = (5 - 2x) (25 + 10x + 4x²)</marquee>$
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Thank you. ;-)

Answer 2

Answer:

hii.... recognized me?