Question

write the roots of quadratic equation x square of 25​

Answer 1

Answer:

Given quadratic equation is

x² - 25 = 0

We can write in another way ,

x² - 5² = 0

We know the the basic formula

a² - b² = (a-b) (a+b)

So , we can write

x² - 5²= 0

(x-5) (x+5) = 0

Hence x = ± 5

The roots of given quadratic equation is ±5.

Answer 2

Step-by-step explanation:

(a+b)^2 =a^2+b^2+2ab