Question

Yg bsa aja. tolong djawabb.. kcuali no.4 slg soal..

Answer 1

1.
2x² + 9x + 4 = 0
(2x + 1)(x + 4) = 0
x = -1/2  atau x = -4
2.
sin a =
sin a = sin 240
a = 240 + k.360
k = 0, a = 240