Calculate <mo stretchy="false">( 7 + 9 i <mo stretchy="false">) &#x2212;<!-- − -->

vilitatelp014

vilitatelp014

Answered question

2022-05-19

Calculate ( 7 + 9 i ) ( 5 7 + 5 i 3 ).

Answer & Explanation

Arturo Wallace

Arturo Wallace

Beginner2022-05-20Added 17 answers

Apply the distributive property.

7+9i-57-5i3

To write 7 as a fraction with a common denominator, multiply by 77.

777-57+9i-5i3

Combine 7 and 77.

777-57+9i-5i3

Combine the numerators over the common denominator.

77-57+9i-5i3

Simplify the numerator.

447+9i-5i3

To write 9i as a fraction with a common denominator, multiply by 33.

447+9i33-5i3

Combine 9i and 33.

447+9i33-5i3

Combine the numerators over the common denominator.

447+22i3

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