Odpowiedź:
1.
[tex]2^{2}[/tex] + [tex]x^{2}[/tex] = [tex]7^{2}[/tex]
4 + [tex]x^{2}[/tex] = 49
[tex]x^{2} = 45\\\\\\\\[/tex]
x = [tex]\sqrt{45}[/tex]
x = [tex]3\sqrt{5}[/tex]
2.
[tex]3^{2}[/tex] + [tex]x^{2}[/tex] = [tex]\sqrt{11} ^{2}[/tex]
9 + [tex]x^{2}[/tex] = 11
[tex]x^{2}[/tex] = 2
x = [tex]\sqrt{2}[/tex]
3.
[tex]2\sqrt{5} ^{2}[/tex] + [tex]x^{2}[/tex] = [tex]9^{2}[/tex]
10 + [tex]x^{2}[/tex] = 81
[tex]x^{2}[/tex] = 71
x = [tex]\sqrt{71}[/tex]
Szczegółowe wyjaśnienie:
