b.x² +11x -80 =0
c.2x² -19x +45 =0
tolongg beri langkah² nyaa
Akar akar persamaan kuadrat dan cara memfaktorkan nya a.x² +21x +80 =0
Gunakan Rumus Pemfaktoran
a.
x² + 21x + 80 = 0
(x + 16)(x + 5) = 0
x 1 = -16
x2 = -5
b.
x² + 11x – 80 = 0
(x + 16)(x – 5) = 0
x 1 = -16
x2 = 5
c.
2x² – 19x + 45 = 0
(2x – 9)(x – 5) = 0
x1 = 9/2
x2 = 5