Solve: (x+2 y)^2-4(a x-y)^2 - Vidyadip

Question

Solve:
$(x+2 y)^2-4(a x-y)^2$

✓

Answer

$=[(x+2 y)-2(2 x-y)][(x+2 y)+2(2 x-y)]$
$=(x+2 y-4 x+2 y)(x+2 y+4 x-2 y)$
$=5 x(4 y-3 x)$

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