tolong donk bagaimana carax no 6 n 7

[tex] {5}^{ - 4} + {25}^{ - 2} \\ = \frac{1}{ {5}^{4} } + \frac{1}{ {25}^{2} } \\ = \frac{1}{625} + \frac{1}{625} \\ = \frac{2}{625} [/tex]

[tex] 6).{5}^{ - 4} + {25}^{ - 2} \\ = \frac{1}{ {5}^{4} } + \frac{1}{ {25}^{2} } \\ = \frac{1}{625} + \frac{1}{625} \\ = \frac{2}{625} \\ jawaban \: a[/tex]
[tex]7).3 \sqrt{2} + 3 \sqrt{50} - 2 \sqrt{8} \\ = 3 \sqrt{2} + 3 \sqrt{25 \times 2} - 2 \sqrt{4 \times 2} \\ = 3 \sqrt{2} + 3 \times 5 \sqrt{2} + 2 \times 2 \sqrt{2} \\ = 3 \sqrt{2} + 15 \sqrt{2} - 4 \sqrt{2} \\ = 14 \sqrt{2} \\ jawaban \: b[/tex]

maaf jika jawabannya salah