tolong plis jawab kk
ayolaaah jawab
gimna caranyaaa??
jawab donkkk
ayolaaah jawab
gimna caranyaaa??
jawab donkkk
PErsamaan Kuadrat
Penjelasan dengan langkah-langkah:
PK 2x² - 4x + 9 = 0
a= 2, b = - 4 , c = 9
a. x1+x2 = -b/a = - (-4)/2 = 4/2 = 2
b. x1. x2 = c/a = 9/2
c. 3x1 + 3x2 =
= 3(x1 + x2)
= 3(2)
= 6
d. 5/x1 + 5/x2 =
= 5 (1/x1 + 1/x2)
= 5 ( x1 + x2)/ (x1.x2)
= 5 (2) / (9/2)
= 20/9
2. PK yang akarnya 2x1 dan 2x2
PK baru =
x²- (2x1 +2x2)x + (2x1)(2x2) =0
x² - 2(x1 +x2) x + 4 x1. x2 =0
x² - 2(2) x + 4(9/2) =0
x² - 4x + 18 =0
