Question

resolva a equação x^2 -7x>9

Answer 1

x^2 -7x>9

x²-7x-9>0

raízes

x'=[7+√(49+36)]/2= (7+√85)/2

x''=[7+√(49+36)]/2= (7-√85)/2

++++++(7-√85)/2-------------(7+√85)/2++++++++++++++

(7-√85)/2 > x > (7+√85)/2  é a resposta