Tuesday, December 15, 2009

How to solve for x and y using complex numbers?

how do you solve fo x and y 28+5yi=-7x+40i ?How to solve for x and y using complex numbers?
Match the real and imaginary parts and then solve for x and y.





28 + 5i y = -7x + 40 i





40i = 5i y





8 = y








28 = -7x





x = -4How to solve for x and y using complex numbers?
hint: a+bi = c + di if and only if a = c and b=d (i.e. the real and corresponding imaginary parts are equal)
28 = - 7x


5y = 40





x = - 4 , y = 8

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