Question

x²-bx+25 os valores de x sao?

a)-6i e 6i
b)I e 7i
c)4+3i e 4-3i
D)-4+3i e -4-3i

Answer 1

Bom dia Kendor

(4 + 3i)*(4 - 3i) = 16 + 9 = 25  (C)
/-4 + 3i)*(-4 - 3i) = 16 + 9 = 25 (D)