Question 105917
{{{16a^4 - 625b^4=(4a^2)^2 - (25b^2)^2}}}
Do you knoew the difference of two squares?
It states that {{{a^2-b^2=(a+b)(a-b)}}}! We can apply this here!

{{{16a^4 - 625b^4=(4a^2+25b^2)(4a^2-25b^2)}}}
{{{16a^4 - 625b^4=(4a^2+25b^2)((2a)^2-(5b)^2)}}}
{{{16a^4 - 625b^4=(4a^2+25b^2)(2a+5b)(2a-5b)}}}


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