Question

factorise
$x { }^{2} - 2x - 15$
​

Answer 1

Answer:

=)x²-2x-15

=)x²-5x+3x+15

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

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

Hope it helps you ☺

Answer 2

Answer:

X^2 - 2x-15=0

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

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

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

X= - 3,5