Factorise: Evaluate
Question:
Factorise:
Evaluate {(405)2 − (395)2}.
Solution:
We have:
$\left\{(405)^{2}-(395)^{2}\right\}=(405+395)(405-395)$
$=(800 \times 10)$
$=8000$
$\therefore\left\{(405)^{2}-(395)^{2}\right\}=8000$