Oblicz . a) (x+7)(2x-3) b) (x+[latex] sqrt{5} [/latex] )(x-[latex] sqrt{5 [/latex]) c) [latex] frac{15x+20y}{5} [/latex]-[latex] frac{4x+8y}{2} [/latex]
Oblicz .
a) (x+7)(2x-3)
b) (x+[latex] sqrt{5} [/latex] )(x-[latex] sqrt{5 [/latex])
c) [latex] frac{15x+20y}{5} [/latex]-[latex] frac{4x+8y}{2} [/latex]