Persamaan Kuadrat

Perhatikan bentuk persamaan – persamaan dibawah ini dan isilah dengan memberikan tanda ( √) jika persamaan tersebut merupakan persamaan kuadrat.[br][br]
Ubahlah persamaan di bawah ini ke bentuk umum persamaan kuadrat ax²+bx+c=0[br]a. -12x=-2x²-3[br]
b. (2x-5)²-81=0
[br]c. (x-2)(3x+5)=x(x-2)[br][br]
[b]Menentukan Akar Persamaan Kuadrat dengan Memfaktorkan[/b][br][br]Berapakah nilai a dan b dengan a x b = 0?
Lalu berapakah nilai x dengan (x-1)(x-2)=0?
Tahap inti dari metode ini adalah memfaktorkan persamaan kuadrat ax[sup]2[/sup]+bx+c=0 dengan a=1 menjadi (x+p)(x+q) atau bisa dituliskan[br] x²+bx+c=(x+p)(x+q)[br] x²+bx+c=x²+(p+q)x+(p x q)[br]Jadi, untuk memfaktorkan harus dicari bilangan p dan q sedemikian sehingga [br]p + q = b dan p x q = c[br][br][b]Contoh : [/b]Tentukan akar-akar dari persamaan kuadrat x²+5x+6=0![br][b]Penyelesaian :[/b][br]Didapat b= 5 dan c = 6, sehingga harus dicari bilangan p dan q sedemikian hingga p + q = 5 dan p x q = 6. Dalam hal ini dilihat syarat p x q = 6 terlebih dahulu, sehingga pasangan nilai p dan q yang mungkin adalah[br][br][img]data:image/png;base64,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[/img][br][br]Kemudian karena juga harus menutupi p+q=5, maka berdasarkan tabel pada baris kedua didapat p=2 dan q=3 atau berdasarkan pada baris ketiga dituliskan p=3 dan q=2 (dua hasil ini merupakan[br]hasil yang sama).[br]Sehingga didapat pemfaktorannya : [br]    x²+5x+6 =0[br]    (x+2)(x+3)=0[br]    x+2=0 atau x+3=0[br]Dengan demikian akar-akarnya adalah x=-2 dan x=-3
Tentukan akar-akar dari persamaan kuadrat x²+2x-3=0 dan gambarkan grafiknya pada geogebra
[justify][b]Jumlah dan Hasil Kali Akar-akar dari Persamaan Kuadrat[br][br][/b]Pada langkah penyelesaian persamaan kuadrat ax²+bx+c=0 dengan a=1 (bisa ditulis x[sup]2[/sup]+[math]\frac{b}{a}[/math]x+[math]\frac{c}{a}[/math]=0)[br]menggunakan pemfaktoran harus ditentukan p dan q sedemikian hingga memenuhi[br] [b] [/b]x²+[math]\frac{b}{a}[/math]x+[math]\frac{c}{a}[/math]=(x+p)(x+q)[br] x²+[math]\frac{b}{a}[/math]x+[math]\frac{c}{a}[/math]=x²+(p+q)x+(pxq)[br]Dengan cara ini didapatkan penyelesaiannya adalah x[sub]1[/sub]=-p dan x[sub]2[/sub]=-q [br]Sehingga, x[sub]1[/sub]+x[sub]2[/sub]=-p-q=-(p+q)=-b/a dan x[sub]1[/sub].x[sub]2 [/sub]=(-p)(-q)=pq=c/a[/justify]
Diketahui x[sub]1[/sub] , x[sub]2[/sub]  merupakan akar-akar dari persamaan kuadrat x²-3x+5=0        [br]Tentukan nilai dari :[br]a. x[sub]1[/sub] + x[sub]2[/sub] =
b. x[sub]1[/sub] . x[sub]2 [/sub]=
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Information: Persamaan Kuadrat