Resposta :
1) -2x^2 + 10x = 0
x . (-2x + 10) = 0
x' = 0
-2x + 10 = 0
-2x = -10
x = -10/-2
x = 5
x" = 5
S = {0 , 5}
2) -4x^2 + 5 = -59
-4x^2 = -59 - 5
-4x^2 = -64
x^2 = -64/-4
x^2 = 16
x = √16
x = ± 4
x' = -4
x" = 4
S = {-4 , 4}
1) -2x^2 + 10x = 0
x . (-2x + 10) = 0
x' = 0
-2x + 10 = 0
-2x = -10
x = -10/-2
x = 5
x" = 5
S = {0 , 5}
2) -4x^2 + 5 = -59
-4x^2 = -59 - 5
-4x^2 = -64
x^2 = -64/-4
x^2 = 16
x = √16
x = ± 4
x' = -4
x" = 4
S = {-4 , 4}