Jawaban:
-. B .2
-. D. -12
Penjelasan dengan langkah-langkah:
x= -3
kx²-(k²+1)x - 33=0
k(-3²)+(k²+1)-3 -33=0
9k-+3k²+3-33=0
3k²+9k-30
-9±√(-9)²-4.3.30/2.3
-9±√81+360/6
-9±√441/6
-9±21 /6
k1= -9+21/6
k1= 12/6
k1 = 2
K2 = -9-21/6
K2= -30/6
K2= -5
k positif= 2
Jawaban B.
-
12+4x-x²=0
-x²+4x+12
x²-4x-12
ABC
-(-4)±√(-4)²-4.1.-12/2.1
4±√16+48/2
4±√64/2
4±8/2
x1 = 4+8/2
x1= 12/2
x1= 6
x2= 4-8/2
x2= -4/2
x2= -2
Maka
x1 × x2
6 × -2
= -12
Jawaban D.
Semoga membantu dan bermanfaat
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Jawaban:
-. B .2
-. D. -12
Penjelasan dengan langkah-langkah:
x= -3
kx²-(k²+1)x - 33=0
k(-3²)+(k²+1)-3 -33=0
9k-+3k²+3-33=0
3k²+9k-30
-9±√(-9)²-4.3.30/2.3
-9±√81+360/6
-9±√441/6
-9±21 /6
k1= -9+21/6
k1= 12/6
k1 = 2
K2 = -9-21/6
K2= -30/6
K2= -5
k positif= 2
Jawaban B.
-
12+4x-x²=0
-x²+4x+12
x²-4x-12
ABC
-(-4)±√(-4)²-4.1.-12/2.1
4±√16+48/2
4±√64/2
4±8/2
x1 = 4+8/2
x1= 12/2
x1= 6
x2= 4-8/2
x2= -4/2
x2= -2
Maka
x1 × x2
6 × -2
= -12
Jawaban D.
Semoga membantu dan bermanfaat