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(3√5x-1)²+x√180-(2√3x-√5)(2√3x+√5)
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URGENT!!!


Răspuns :

(3√5x-1)²+x√180-(2√3x-√5)(2√3x+√5)=
[(3√5x)²-2x3√5x+1²)+x√180-[(2√3x)²-(√5)²]=
45x²-6√5x+1+6x√5-12x²-5=
33x²-4