4x² = 3(4x + 5)
Pakai rumus A.B.C![]()
Pakai rumus A.B.C
Penyelesaian:
4x²=3(4x+5)
4x²=12x+15
4x²-12x-15=0
D=b²-4ac
D=(-12)²-4(4)(-15)
D=144-16(-15)
D=144+240
D=384
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x=b±√D/2a
x=-12±√384/2(4)
x=-12±√384/8
-----------------
x=-12+√384/8
x=-12-√384/8
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