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Pakai rumus Abc
x1,x2= -b±√D/2a
x1,x2= -2±√2²-4(5)(90)/2(5)
x1,x2= -2±√-1796/10
jadi, nilai x bukan bil.real
mencari x menggunakan rumus abc dengan,:
a = 5
b = 2
c = 90
mencari diskriminan
D = b²-4ac
= (2)²-4(5)(90)
= 4-20(90)
= 4-1800
= -1.796
x1,x2 = -b +- √D
= -2 +- √ -1.796
Pembahasan:
karena Dnya √-1.796 , x bukan bilangan real dan bukan juga bilangan rasional
soal serupa dapat kk lihat di:
brainly.co.id/tugas/8911308
brainly.co.id/tugas/841955
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kategorisasi
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Pelajaran :Matematika
Kelas :8
Bab :1
Nama Bab :Operasi Aljabar
kata kunci :riil,abc,rasional
Kode mapel:2
Kode :8.2.1
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