Question 537823
{{{ 25a^2-(3a+2b)^2 }}}
FOIL (3a+2b)(3a+2b) to 9a^2 + 12ab + 4b^2, then you have
{{{ 25a^2-(9a^2 + 12ab + 4b^2) }}}
Remove the brackets, this changes the signs
{{{ 25a^2 - 9a^2 - 12ab - 4b^2) }}}
Combine the like terms
{{{ 16a^2 - 12ab - 4b^2) }}}
Factor out 4
{{{ 4(4a^2 - 3ab - b^2) }}}
Factor again
{{{ 4(4a+b)(a-b) }}}
:
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