Answer:
7 + 35i
Step-by-step explanation:
[tex]7i(5 - i) \\ \\ = 7i \times 5 - 7 {i}^{2} \\ \\ = 35i - 7( - 1) \\( \because \: {i}^{2} = - 1) \\ = 35i + 7 \\ \\ = 7 + 35i[/tex]
7+35i
the answer above seems more correct so
