Nilai minimum fungsi kuadra

$nilai : minimum : fungsi : kuadrat : dari : f(x) = 4x { - 9}^{2} : : : pakai : cara$

Nilai minimum fungsi kuadra

$y=4x^2-9\ nilai minimum?\ frac {-b}{2a}\ frac {-(-9)}{2.4}\ =frac {9}{8}(untuk nilai minimum x)\ jika nilai minimum y\y=4.9^2/8^2-9\ y=4.frac {81}{64} -9\ y=frac {324}{64}-9\ y=frac {-252}{64} \y=frac {-63}{16}\ kordinat (frac {9}{8},frac {-63}{16})$