Cześć!
a)
[tex]\sqrt{16+9}=\sqrt{25}=\sqrt{5^2}=5\\\\\sqrt{16}+\sqrt4=\sqrt{4^2}+\sqrt{2^2}=4+2=6\\\\\boxed{\sqrt{16+9}<\sqrt{16}+\sqrt4}[/tex]
b)
[tex]\sqrt{25-9}=\sqrt{16}=\sqrt{4^2}=4\\\\\sqrt{25}-\sqrt9=\sqrt{5^2}-\sqrt{3^2}=5-3=2\\\\\boxed{\sqrt{25-9}>\sqrt{25}-\sqrt9}[/tex]
