Question

calcule as potências.
a,(15)²
b,(3√7)²
c,(√7+√3)²
d,(3-√7)²

Answer 1

$(15) {}^{2} = 222 \\ (3 \sqrt{7) { }^{2} } = 63 \\ ( \sqrt{7 + \sqrt{3) {}^{2} } } = 9 \\ (3 - \sqrt{7) { }^{2} } = 0.125$