Please explain the logic of finding max and min, I get it wrong each time..

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IPMAT/Algebra
Academic discussion and doubt solving for: Progression & Series, Inequalities, Linear Equation, Functions, Modulus, Minima & Maxima, Polynomials, Identities, Indices
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52-5=47
how?
correct answer?
yes but how ?
its a very simple question,you havent done set theory?
nopeeeeeeeeeee sadlyyyy :( from which source you have done it?
takshzilla btw you can also search flag approach for set theory on yt
DO THEY TEACHES ON YOUTUBE FOR FREE???
\
nooo:(