Question

Resolva as equações usando a forma de bhaskara

A) X²- 4X +3=0

B) X²+ 4X -12=0

C) X²- 2X -3=0

D) X²+ 8X +16=0

E) X² -14X +49=0

Answer 1

A) x² - 4x + 3= 0

x =  2 + -√4 - 3

x' = 2 + 1  →  x' = 3

x" = 2 - 1  →  x" = 1

B) x² + 4x - 12 = 0

x = - 2 + -√4 + 12

x = - 2 + -√16

x' = - 2 + 4 →  x' = 2

x" = - 2 - 4  →  x" = - 6

C) x² - 2x - 3 = 0

x = 1 + -√1 + 3

x = 1 + -√4

x" = 1 + 2  →  x' = 3

x" = 1 - 2  →  x" = - 1

D) x² + 8x + 16 = 0

x = - 4 + -√16 - 16

x' = x" → - 4

E) x² - 14x + 49 = 0

x = 7 + -√49 - 49

x' = x" →  7