Oblicz:
(\sqrt{175}-\sqrt{252}+\sqrt{63})^{2}
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Rozpiszę każdy pierwiastek osobno:
czyli:
(V175 -V252 + V63)^2 =
= (V25 x V7 - V36 x V7 + V9 x V7)^2 =
= (5V7 - 6V7 + 3V7)^2 =
= (2V7)^2 =
= 2^2 x (V7)^2 =
= 4 x 7 =
= 28