Question

x² - 8x + 7 (cálculo por favor)​

Answer 1

x²—8x+7=0

∆=(—8)²—4•1•7

∆=64—28

∆=36

x'e''=(-b±√∆)/2•a

x' = (8+√36)/2•1

x' = (8+6)/2

x' = 14/2

x' = 7

x''=(8—6)/2•1

x'' = 2/2

x'' = 1

Sol: { 1; 7 }

DúvidS?Comente!!