ankithb232 ankithb232
  • 16-06-2017
  • Mathematics
contestada

For what real number k does the product (25 + ki)(3+2i) equal a real number?

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ghanami
ghanami ghanami
  • 27-06-2017
hello : 
(25 + ki)(3+2i) = 75+50i +3ki -2k = (75-2k) +i (3k+50)
the product (25 + ki)(3+2i) equal a real number: 3k +50 = 0
k = -50/3

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