Question

please tell me the answer​

Answer 1

Here,

∠ABD = ∠BAC + ∠ACB

→ 3x² + 1 + 2x = 2x² + 1 + 3x + 6

→ 3x² - 2x² = 3x - 2x + 6

→ x² = x + 6

→ x² - x - 6 = 0

→ x² - 3x + 2x - 6 = 0

→ x(x - 3) + 2(x - 3) = 0

→ (x - 3)(x + 2) = 0

→ x = 3 or (-2)