Question

rationalising factor of 5 + 3√2​

Answer 1

Step-by-step explanation:

(√5-3) (√5+3) = (√5) square - 3 square = 5-9= -4.

Answer 2

Answer:

First multiply the opposite sign .

5+3✓2 + 5-3✓2

Using (a+✓b)(a-✓b)=a^2-b

(5)^2-(3✓2)^2

25-(9x2)

25-18

=7