Question

1°. X2 + 49 = 0
Ayúdeme

2°. X2 - 2 x 80 = 0


3° x2 - 70x + 1.800

Answer 1

X² + 49 = 0
x² + 7² = 0

(x+7i) (x-7i) = 0

x = ± 7i

x² - 2x - 80 = 0

(x-10)(x+8) = 0

x = 10 o x = -8


x² - 70x + 1800 = 0

x = 70/2 ± (10/2)√23 i

x = 35+5√23 i

x = 35-5√23 i