Question

Check whether-3and3 are the zeroes of the polynomials x square -9

Answer 1

Answer:

x = 3 and x = (-3) are zeros of polynomial x²-9

Explanation:

Let p(x)= x²-9

By the algebraic identity (a+b)(a-b) = a²-b²

=> x²-(3)²

=> (x+3)(x-3) ....... (i)

Equating (i) to 0, we get

x+3=0                                     x-3=0

=> x = (-3)                               => x = 3

Hence, proved