Factorise:
Question:

Factorise:

$x^{2}-21 x+90$

 

Solution:

$x^{2}-21 x+90$

$=x^{2}-15 x-6 x+90$

$=x(x-15)-6(x-15)$

$=(x-6)(x-15)$

 

Administrator

Leave a comment

Please enter comment.
Please enter your name.