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3 years ago

What is the standard form of (7-5i)(2+3i)? A.-29+11i B.29+11i C. 11-29i D.-11+29i

Mathematics

2 answers:

pentagon [3]3 years ago

7 0

Answer:

B) 29 + 11i.

Step-by-step explanation:

Given : (7-5i)(2+3i).

To find : What is the standard form .

Solution : We have given (7-5i)(2+3i).

Distributes 7 over (2+3i) and 5i over (2+3i).

7 (2+3i) - 5i (2+3i).

14 + 21i - 10 i - 15 i².

Combine like terms.

i² = -1.

14 + 21i -10i - 15(-1).

14 + 11i + 15.

14 + 15 + 11 i.

29 + 11i.

Therefore, B) 29 + 11i.

Lubov Fominskaja [6]3 years ago

5 0

It might be the last one but I don't know

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