Question

is equal to 2 minus root 5 upon 2 + root 5 and b is equal to 2 + root 5 upon 2 minus root 5 find the value of a + b cube​

Answer 1

You forgot 'if a' is equal to... in the behinning...

Answer 2

Answer:

a is equal to 2 - root 5 / 2 + root 5

Rationalization factor = 2 - root 5

2 minus root 5 the whole square by 2 the whole sq - root 5 the whole sq

2 the whole sq - 2 into (2)(root 5 ) + ( root 5 ) the whole sq by

4 minus 5

= 4 - 4 root 5 + 5 = 9 - 4 root 5

2 plus root 5 / 2 - root 5

Rationalization factor = 2 + root 5

(2 + root 5 ) thewhole sq / 2 the while sq - root 5 the whole sq

(2) the whole sq + 2(2)(root 5 ) + (root 5 ) the whole sq

by

4-5

=9+4root5

a = 9 - 4root5 , b = 9 plus 4 root 5

(9 -4 root 5 + 9 - 4 root 5 ) the whole cube

minus root 5 and plus root five will get canceled the remaining 9 gets added and we get

18 the whole cube

= 5832