3 years ago

What’s is this please help

Mathematics

2 answers:

stiv31 [10]3 years ago

7 0

Answer:

7+35i

Step-by-step explanation:

the answer above seems more correct so

olganol [36]3 years ago

5 0

Answer:

7 + 35i

Step-by-step explanation:

$7i(5 - i) \\ \\ = 7i \times 5 - 7 {i}^{2} \\ \\ = 35i - 7( - 1) \\( \because \: {i}^{2} = - 1) \\ = 35i + 7 \\ \\ = 7 + 35i$

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