[tex](2 - 3x {)}^{2} = \boxed{ 4 - 12x + 9 {x}^{2} }[/tex]
[tex](y + 3 {)}^{2} = \boxed{ {y}^{2} + 6y + 9}[/tex]
[tex]( \sqrt{3} + 2)( \sqrt{3} - 2) = 3 - 4 = \boxed{- 1}[/tex]
[tex](3 \sqrt{2} + 3 {)}^{2} = (3 \sqrt{2} {)}^{2} + 2 \times 3 \sqrt{2} \times 3 + 9 = \boxed{18 + 18 \sqrt{2 } + 9}[/tex]
Użyte wzory skróconego mnożenia
[tex](a - b)(a + b) = {a}^{2} - {b}^{2} [/tex]
[tex](a - b {)}^{2} = {a}^{2} - 2ab + {b}^{2} [/tex]
[tex](a + b {)}^{2} = {a}^{2} + 2ab + {b}^{2} [/tex]
