How could I factorise this? a^2+100a-100b+40ab+b^2 I know it's a square number so I must be able to factorise it into something along the lines of (...)^2
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suppose its a trionym with unknown letter a and b known. $\displaystyle \[{a^2} + \left( {100 + 40b} \right)a + {b^2} - 100b\]$
I don't think it's a trinomial... I've researched those types of equations and I don't think it's possible to factorise... my mistake, sorry.
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