Hej!
Obliczenia :
[tex]a] \ (x-1)^2=x^2-2\cdot x\cdot1+1^2=x^2-2x+1\\\\b] \ (3+y)^2=3^2+2\cdot3\cdot y+y^2=y^2+6y+9\\\\c] \ (b-a)(b+a)=b^2-a^2\\\\d] \ (2w-x)^2=(2w)^2-2\cdot2w\cdot x+x^2=4w^2+x^2-4wx\\\\e] \ (n+3x)^2=n^2+2\cdot n\cdot 3x+(3x)^2=n^2+9x^2+6nx\\\\f] \ (4-s)(4+s)=4^2-s^2=-s^2+16[/tex]
Wykorzystane wzory :
[tex](a+b)^2=a^2+2ab+b^2\\\\(a-b)^2=a^2-2ab+b^2\\\\(a+b)(a-b)=a^2-b^2[/tex]
