tolong jawab pakai cara ya

Diketahui :
- x1 = 3/2
- x2 = - 7/4

Ditanya :
- Persamaan Kuadrat Berakar 3/2 dan - 7/4 = .....?

Penyelesaian :
x1 :
x = 3/2
x × 2 = 3
2x = 3
2x - 3 = 0

x2 :
x = - 7/4
x × 4 = - 7
4x = - 7
4x + 7 = 0

(2x - 3)(4x + 7)
= (2x × 4x) + (2x × 7) - (3 × 4x) - (3 × 7)
= 8x² + 14x - 12x - 21
= 8x² + 2x - 21

Maaf Kalau Salah