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OpenStudy (anonymous):
If z = (15 + 8i) ÷ (3 - 4i), then |z| = _____.
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OpenStudy (freckles):
you can multiply bottom and top of what is called z by the conjugate of the bottom that is (3+4i)
OpenStudy (freckles):
and then you will be able to put z in the form a+bi and then |z|= sqrt(a^2+b^2)
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