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(√3x + 2√3)² = (√3x)² + 2* √3x * 2√3 + (2√3)² = 3x² + 4*3*x + 4*3= =3x² + 12x +12
b) (3√2 + √2x)² = (3√2)² + 2* 3√2*√2x + (√2x)² = 9*2 + 6*2*x + 2x² = = 18 + 12x + 2x²
wzory skróconego mnozenia są wazne wiec "zgłęb je" dobrze. :)
b)