[tex]a) (a-3)^{2}= a^{2} - 2*3*a +3^{2} = a^{2} -6a+9\\b) (7-b)^{2} = 7^{2} - 2*7*b + b^{2} = 49 - 14b + b ^{2} = b^{2} - 14b + 49\\c) (x-12)^{2} = x^{2} - 2*12*x + 12^{2}= x^{2} - 24x + 144\\d) (2\sqrt{2} -x)^{2}=(2\sqrt{2)} ^{2} - 2*2\sqrt{2} *x +x^{2} = 4*2 - (4\sqrt{2})x + x^{2} = x^{2} - (4\sqrt{2} )x +8[/tex]
Korzystałam z wzoru:
[tex](a-b)^{2} = a^{2}-2ab+b^{2}[/tex]
