Question

The value of 3√5 + 7√5 is​

Answer 1

7+3√5/(3+√5) - 7-3√5/(3-√5) a + √5b = (7+3√5)(3-√5) - (7-3√5)(3+√5)/(3+√5) (3-√5) = a + √5b

21-7√5+9√5-15-21-7√5+9√5+15/9-5

= a 4√5/4

= a + √5b

+ √5b

√5 = a + √5b

a = 0 and b= 1 answer.