Question

Factorise       125k3 + 27m3​

Answer 1

Answer:

We know that

=(5k)3+(3m)3

=(5k+3m)<(5k)2 +(3m)2-(5k)(3m)>

=(5k+3m)(25k2 + 9m2-15km)

Step-by-step explanation:

May ans help you

Answer 2

Answer:

We know that,

a³ + b³ = (a + b) (a² – ab + b²)

125k3 + 27m3 = (5k)³ + (3m)³

Here, a = 5k and b = 3m

Now, substituting in the above formula, we get

(5k)³ + (3m)³ = (5k + 3m) [(5k)² – (5k)(3m) + (3m)²]

= (5k + 3m) (25k² – 15km + 9m²)