Jawaban:
jadi gini puh sepuhhhh
2x²-5x = 7 ubah menjadi 2x²-5x-7
rumus diskriminan
b²-4ac
= -5²-4.2.-7
= 25-(-56)
= 25+56
= 81 (B.)
Persamaan kuadrat
[tex]2 {x}^{2} - 5x = 7 \\ 2 {x}^{2} - 5x - 7 = 0 \\ a = 2 \: \: \: b = - 5 \: \: \: c = - 7 \\ \\ Nilai \: diskrimina n\\ {b}^{2} - 4ac \\ ( { - 5)}^{2} - 4(2)( - 7) \\ 25 + 56 \\ 81 \: (B)[/tex]
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Jawaban:
jadi gini puh sepuhhhh
2x²-5x = 7 ubah menjadi 2x²-5x-7
rumus diskriminan
b²-4ac
= -5²-4.2.-7
= 25-(-56)
= 25+56
= 81 (B.)
Verified answer
Persamaan kuadrat
[tex]2 {x}^{2} - 5x = 7 \\ 2 {x}^{2} - 5x - 7 = 0 \\ a = 2 \: \: \: b = - 5 \: \: \: c = - 7 \\ \\ Nilai \: diskrimina n\\ {b}^{2} - 4ac \\ ( { - 5)}^{2} - 4(2)( - 7) \\ 25 + 56 \\ 81 \: (B)[/tex]