Question

The zeros of the polynomial x² – 5 are

(A) 5, -5

(B) -5, 5

(C) -√5, √5

(D) √5, √5

Answer 1

Answer : (C) -√5, √5

We have,

f(x) = x² – 5

Now put f(x) = 0

x² – 5 = 0

x² – (√5)² = 0

(x + √5)(x - √5) = 0

x + √5 = 0 or x - √5 = 0

x = -√5 or x = √5

So, the zeros of given polynomial are -√5 and √5.