Question

Rationalising factor of 7 + 3 √2 is​

Answer 1

Answer:

The (x+1)3 formula can be verified or proved by multiplying (x + 1) three times, i.e,

(x+1)3 = (x+1)(x+1)(x+1)

(x+1)3 = [x2 + x + x + 1] (x + 1)

= (x + 1) [x2 + 2x + 1]

= x3 + 2x2 + x + x2 + 2x + 1

= x3 + 3x2 + 3x + 1

Therefore, (x+1)3 = x3 + 3x2 + 3x + 1

Answer 2

Answer:

refer to the attachment

I hope it helpful to you