Question

utilizando bhaskara determine -x2+ 14 x- 49 =0​

Answer 1

Resposta:

-x2+14x-49=0

x²-14x+49=(x-7)²   =0    ==>raízes =7

x'=[14+√(14²-4*49)]/2=[14+√(196-196)]/2=14/2=7

x''=[14-√(14²-4*49)]/2=[14-√(196-196)]/2=14/2=7