Question

usando a fórmula de Bhaskara, resolva:
( x + 9 )² = 2x . ( x + 8 )

Answer 1

Resposta:

( x + 9 )² = 2x . ( x + 8 )

x²+18x+81 = 2x²+16x

2x²-x²+16x-18x -81=0

x²-2x-81=0

x'=[2+√(4+324)]/2=[2+2√82)]/2 =1+√82

x''=[2-√(4+324)]/2=[2-2√82)]/2 =1-√82