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Ivenika [448]
3 years ago
8

Find the product and fill in the blanks to write in standard complex number form.

Mathematics
1 answer:
Semenov [28]3 years ago
7 0
Recall that i represents the square root of -1, so by squaring it we get -1.

(2 + 4i)(7 - 3i)

= 14 - 6i + 28i + 12
= 26 + 22i
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Use the Distributive Property to find (z−5)(z+3).
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So then replacing a again with our definition we get, z(z-5)+3(z-5)=z^2-5z+3z-15=z^2-2z-15.
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Add and round to the correct number of significant digits: 13.8 + 60 70 73 73.8 74
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