nomor 1
anak 1 = x
anak 2 = y
anak 3 = z
jumlah uang = A
x + y + z = 1
½ + ⅓ + z = 1
5/6 + z = 1
z = 1/6
zA = 20000
1/6A = 20000
A = 120000
nomor 2
4x² + 5x - 6
= (4x - 3)(x + 2)
4x - 3 = 0
4x = 3
x1 = ¾
x + 2 = 0
x2 = -2
jadi faktornya ¾ dan -2
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nomor 1
anak 1 = x
anak 2 = y
anak 3 = z
jumlah uang = A
x + y + z = 1
½ + ⅓ + z = 1
5/6 + z = 1
z = 1/6
zA = 20000
1/6A = 20000
A = 120000
nomor 2
4x² + 5x - 6
= (4x - 3)(x + 2)
4x - 3 = 0
4x = 3
x1 = ¾
x + 2 = 0
x2 = -2
jadi faktornya ¾ dan -2