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bantu aku yuk kak 1.bagaimana grafik fungsi kuadrat -2x2+5+7=0 jika dilihat

Berikut ini adalah pertanyaan dari yeirapohan07 pada mata pelajaran Matematika untuk jenjang Sekolah Menengah Pertama

Bantu aku yuk kak1.bagaimana grafik fungsi kuadrat -2x2+5+7=0 jika dilihat dari nilai diskriminan
2.tentukan nilai diskriminan dari x2+3+10=0

Jawaban dan Penjelasan

Berikut ini adalah pilihan jawaban terbaik dari pertanyaan diatas.

Materi: Fungsi dan Persamaan Kuadrat

JAWABAN:

1). Diskriminan (D) = b² - 4ac

a → koefisien x²

b → koefisien x

c → konstanta

-2x² + 5x + 7 = 0

a = -2, b = 5, c = 7

D = 5² - 4(-2)(7)

= 25 - (-56)

= 25 + 56

= 81

Karena D > 0, maka grafik fungsi memotong sumbu-x pada dua titik.

2). x² + 3x + 10 = 0

a = 1, b = 3, c = 10

D = 3² - 4(1)(10)

= 9 - 40

= -31

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Last Update: Sat, 26 Feb 22
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