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31-07-2019
Mathematics

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If y= x^2+3x+5, evaluate y given x= 2+i .

If y x23x5 evaluate y given x 2i class=

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salatulmaghrib salatulmaghrib

31-07-2019

Replace x with 2+i and solve
Remember that i is the square root of -1
My phone automatically capitalizes I, so don’t be confused by that!
y=(2+I)^2 + 3(2+I) +5
y=4+4i-1+6+3i+5
y=7i+14

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