Jawaban:
1. x=1 atau x=2
2. b
Penjelasan dengan langkah-langkah:
1.
x²-3x+2= 0
(x-1)(x-2)= 0
x-1= 0
x= 1
x-2= 0
x= 2
2.
cos 315°
= cos (360°-45°)
= cos 45°
= 1/2 akar 2.
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Jawaban:
1. x=1 atau x=2
2. b
Penjelasan dengan langkah-langkah:
1.
x²-3x+2= 0
(x-1)(x-2)= 0
x-1= 0
x= 1
x-2= 0
x= 2
2.
cos 315°
= cos (360°-45°)
= cos 45°
= 1/2 akar 2.