Question

solve the following equation by factorisation method. (a) x^2 -9=0​

Answer 1

Answer:

${x}^{2} - 9 = 0$

${x}^{2} - {3}^{2} = 0$

$(x - 3)(x + 3) = 0$

Now x = 3,-3

Answer 2

Step-by-step explanation:

x² - 9 = 0

(x)² - (3)² = 0

As,

(a)² - (b)² = (a+b)(a-b)

(x +3)(x - 3) = 0

x = +3, x = -3

hope this answer helped you