Resposta :
x² = 7.x -6
x² = 7x -6
x² -7x +6=0
a= 1 b= -7 c= +6
▲= b² -4.a.c= (-7)²- 4.(1) .(+6) = +49 -24 = 25
x= (-b ± √▲)/2.a
x=[-(-7) ± √25]/2.1
x=[+7 ± 5]/2
x'=[7+5]/2 = 12/2= 6
x"=[7-5]/2= 2/2= 1
S{6 , 1}
x² = 7x -6
x² -7x +6=0
a= 1 b= -7 c= +6
▲= b² -4.a.c= (-7)²- 4.(1) .(+6) = +49 -24 = 25
x= (-b ± √▲)/2.a
x=[-(-7) ± √25]/2.1
x=[+7 ± 5]/2
x'=[7+5]/2 = 12/2= 6
x"=[7-5]/2= 2/2= 1
S{6 , 1}
x² = 7x - 6
x² - 7x + 6 = 0
a = 1 b = - 7 c = 6
/\ = b² - 4ac
/\ = (- 7)² - 4 * 1 * 6
/\ = 49 - 24
/\ = 25
x = - b + V¨¨¨¨/\
-------------------
2a
x = - (- 7) + V¨¨¨¨25
-----------------------
2 * 1
x = 7 + 5
--------
2
x' = 7 + 5
2
x' = 12 : 2
x' = 6
x" = 7 - 5
2
x" = 2 : 2
x" = 1
Resposta: {6, 1}
x² - 7x + 6 = 0
a = 1 b = - 7 c = 6
/\ = b² - 4ac
/\ = (- 7)² - 4 * 1 * 6
/\ = 49 - 24
/\ = 25
x = - b + V¨¨¨¨/\
-------------------
2a
x = - (- 7) + V¨¨¨¨25
-----------------------
2 * 1
x = 7 + 5
--------
2
x' = 7 + 5
2
x' = 12 : 2
x' = 6
x" = 7 - 5
2
x" = 2 : 2
x" = 1
Resposta: {6, 1}