Simplify the expression (10 + 3i)(10 - 3i) 91 109 100-30i 100+30i

asked Mar 13, 2021 44.2k views

3 votes

Simplify the expression (10 + 3i)(10 - 3i)

91
109
100-30i
100+30i

5.9k points

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3 votes

Answer:

B) 109

Explanation:

I took the test and got a 100%

Gravstar answered Mar 16, 2021

5.4k points

4 votes

Answer:

(10 + 3i)(10 - 3i)=109

Explanation:

$(10+3i)(10-3i)=(10^(2) -10*3i)+(3*10i-3*3i^2)\\ =100-30i+30i-9i^2\\=100-9*(-1)\\=100+9=109$

Chemicalkt answered Mar 20, 2021

5.9k points

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