Question

find the cube of 5a+3b​

Answer 1

5a+3b

cubing we get

=(5a+3b)³

we know,

(a+b)³=a³+b³+3a²b+3ab²

Thus,

(5a+3b)³ = (5a)³+ (3b)³+ 3(5a)²(3b) +

3(5a)(3b) ²

= 125a³ + 27b³ + 225a²b + 135ab²

Answer 2

5a+3b

Reference formula : (a+b)

(5a)³ + (3b)³ + 3.5a.3b (5a+3b)

125a³ + 27b³ + 45ab (5a+3b)

125a³ + 27b³ + 22a²b + 135ab²

HOPE IT HELPS