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Express (4 - 5i)(5 + 5i) in the form a + bi, where a and b are integers and i^2 = -1.

 May 16, 2022
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(4-5i)(5+5i)=4(5)+4(5i)-5i(5)-5i(5i)=20+20i-25i-25i^2=20-5i-25(-1)=20-5i+25=45-5i is your answer.

 May 16, 2022

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