Question

X square minus 2 root 5 x minus 15 is equals to zero

Answer 1

Answer:root5+2root5

And root5-2root5

Explanation:

Firsty,we have to apply

B^2-4ac

(2root5)^2-4*1*(-15)

4*5+4*15

20+60

80

So the eq^n has real roots

Now,

X=-b+-root b^2-4ac/2a

X= 2root5+-root80/2

If,

X=2root5+root80/2

X=2root5+4root5/2

X=2(root5+2root5)/2

X=root5+2root5

And,

Simuntanesoly,

X=root5-2root5