Question

solve equation using factorisation method x² - 16=0. (quadratic equation)​

Answer 1

Answer:

x^2-16=0

x^2=16

x=√16

x= +16 or -16

Answer 2

Given:

$x {}^{2} - 16 = 0 \\ = > x {}^{2} - 4 { }^{2} = 0 \\ = > (x + 4)(x - 4) = 0 \\ = > either \: \: x + 4 = 0 \: \: or \: x - 4 = 0 \\ = > x = - 4 \: or \: 4$

this is the solution