Pertanyaan

Diketahui fungsi kuadrat y = 2 x 2 − 5 x − 3 . H. Gambar grafiknya

Diketahui fungsi kuadrat $y = 2 x^{2} - 5 x - 3$ .
H. Gambar grafiknya

H. Hermawan

Master Teacher

Mahasiswa/Alumni Universitas Lampung

Jawaban terverifikasi

Pembahasan

$begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row y equals cell 2 x squared minus 5 x minus 3 end cell row 0 equals cell 2 x squared minus 5 x minus 3 end cell row blank equals cell left parenthesis 2 x plus 1 right parenthesis left parenthesis x minus 3 right parenthesis end cell row blank blank blank row cell x subscript 1 end cell equals cell negative 1 half end cell row cell x subscript 2 end cell equals 3 row blank blank blank row cell Titik space potong space sb. space straight x end cell equals cell left parenthesis negative 1 half comma space 0 right parenthesis space dan space left parenthesis 3 comma space 0 right parenthesis space end cell row blank blank blank row y equals cell 2 x squared minus 5 x minus 3 end cell row y equals cell 2 left parenthesis 0 right parenthesis squared minus 5 left parenthesis 0 right parenthesis minus 3 end cell row y equals cell negative 3 end cell row blank blank blank row cell titik space potong space sb. space straight y end cell equals cell left parenthesis negative 3 comma space 0 right parenthesis end cell row blank blank blank row cell x blank subscript s end cell equals cell negative fraction numerator b over denominator 2 a end fraction end cell row blank equals cell 5 over 4 end cell row cell nilai space ekstrim space y end cell equals cell 2 left parenthesis 5 over 4 right parenthesis blank squared minus 5 left parenthesis 5 over 4 right parenthesis minus 3 end cell row blank equals cell 25 over 8 minus 25 over 4 minus 3 end cell row blank equals cell fraction numerator 25 minus 50 minus 24 over denominator 8 end fraction end cell row blank equals cell negative 49 over 8 end cell row cell titik space ekstrim end cell equals cell open parentheses 5 over 4 comma space minus 49 over 8 close parentheses end cell end table end style$