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(x+6)la a 2 (5+x)la a 2 (3x+1)la a 2 (radical din 3 +x)la a 2

Răspuns :

(x+6)² = x²+2*x*6+6² = x²+12x+36 ;

(5+x)² = 5²+2*5*x+x² = 25+10x+x² ;

(3x+1)²= 9x²+6x+1 ;

(√3+x)² = √3²+2*√3*x+x²= 3+2√3x+x²