Question

Solve : x^2 - 2x - 15 = 0

Method of Quadratic equation.

Answer 1

Step-by-step explanation:

SOLUTION

Given :

${x}^{2} - 2x - 15 = 0$

Find :

The roots of given equation.

SO :

$= > {x}^{2} - 5x + 3x - 15 = 0$

$= > x(x - 5) + 3(x - 5) = 0$

$= > (x - 5)(x + 3) = 0$

$= > x - 5 = 0 \: \: \: or \: \: \: x + 3 = 0$

$= > x = 5 \: \: \: or \: \: \: x = - 3$

Hence :

The roots of the given equation are 5, -3.

Answer 2

Step-by-step explanation:

Given,-> x^2-2x-15=0

==>x^2-5x+3x-15=0

==>x(x-5)+3(x-5)=0

==>(x-5)(x+3)=0

==>x=5,-3

hope it will help you Dear