1. Xkuadrat+3X-18=0 2. Xkuadrat-8X+15=0 3. 6Xkuadrat+13X-5 4. 2 Xkuadrat+11X-21=0

Mapel : Matematika
Kelas : VIII SMP
Bab : Persaman Kuadrat

Pembahasan :
x² + 3x - 18 = 0
(x + 6)(x - 3) = 0
x = -6
x = 3

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x² - 8x + 15 = 0
(x - 5)(x - 3) = 0
x = 3
x = 5

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6x² + 13x - 5 = 0
(3x - 1)(2x + 5) = 0
x = 1/3
x = -5/2

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2x² + 11x - 21 = 0
(2x - 3)(x + 7) = 0
x = 3/2
x = -7