Question

2×elevado a 2 + 25× +50 =0

Answer 1

2x² + 25 x + 50 = 0

25² - 4 . 2 . 50
625 - 400
225
15

x` = -25 + 15 /2.2
-10/4 ou 5/2
x` = -2,5 ou -5/2

x`` = - 25 - 15/2.2
-40/2.2
x`` = -10

Answer 2

Delta = b² - 4.a.c 
Delta = 25² - 4 .2.50
Delta = 125 

x= -b +/- raiz quadrada de Delta/ 2.a
x1 = -25 - 15 /4 = 40/4 = -10
x2 = -25 + 15 / 4 = -10/4 = -2,5