Question

Find the zero of x^2-9.

Answer 1

Heya,

x² - 9 = 0
(x)² - (3)² = 0
(x)² = (3)²

Square will get cancelled,
Then,

x = 3

So, the zero of the equation is 3.

Hope this helps....:)

Answer 2

x^2 - 9 =0
x^2 -(3)^2 =0
(x-3)(x+3)
x=3 and -3
i hope this help u