Bonjour,
[tex]B = \frac{3.2 \times 10 {}^{ - 3} \times 5 \times (10 {}^{2}) {}^{3} }{ 4 \times 10 {}^{ - 2} } = \frac{16 \times {10}^{ - 3} \times 10 {}^{6} }{4 \times 10 {}^{ - 2} } = 4 \times 10 {}^{2} \times 10 { }^{ - 3} \times 10 {}^{6} = 4 \times 10 {}^{5} [/tex]
[tex]C = (2 + \sqrt{3} ) {}^{2} + (1 - 2 \sqrt{3} ) {}^{2} [/tex]
[tex]C = 4 + 4 \sqrt{3} + 3 + 1 - 4 \sqrt{3} + 12 = 4 + 3 + 1 + 12 = 20[/tex]
