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maka a + b
= 4b
4b = m + 4
b = m + 4 / 4
a . b = 3b²
3b² = 4m + 4
3.(m + 4 / 4)² = 4m + 4
3.(m² + 8m + 16)/16 = 4m + 4
kalikan kedua ruas dengan 16
3(m² + 8m + 16) = 16(4m + 4)
3m² + 24m + 48 = 64m + 64
pindah ruas sehingga
3m² - 40m - 16 = 0
(3m -