Question

Write the quadratic equation in standard form. (x - 3) 2 = 0

Answer 1

(x - 3)^2 = 0
(x - 3)(x - 3) = 0
x^2 - 3x - 3x + 9 = 0
x^2 - 6x + 9 = 0 <===

Answer 2

`x^(2) -6x+9`

Explanation:

This binomial can be solved by the perfect square binomial method. Its standard form is:

`(a-b)^(2)  = a^(2) -2ab+b^(2)`

In this way, substituting

`a=x;    b=3`

`(x-3)^(2)  = x^(2) -2(x)(3)+(3)^(2)  = x^(2) -6x+9`