Question

use middle term splitting method 3x²-1 2x+15​

Answer 1

NO NO NO NO NO NO . . . . . . . . . . . . . .

Answer 2

3x² + 12x + 15 = 0

dividing by 3

⇒ (3x² + 12x + 15)/3 = 0

⇒ x² + 4x + 5 = 0

⇒ x² + 4x = -5

⇒ x² + 2×2×x + 2² = -5 + 2²

⇒ (x + 2)² = -5 + 4 = -1

⇒ x + 2 = √-1 = +i, -i

⇒ x = -2-i and -2+i