Question

12x+15-3x^2 factorise ​

Answer 1

Step-by-step explanation:

(3x+3)(5-x) are the given factors

Answer 2

Answer:

$= > 12x + 15 - 3x {}^{2} = 0 \\ = > 3x {}^{2} - 12x - 15 = 0 \\ = > 3x {}^{2} - 15x + 3x - 15 = 0 \\ = > 3x(x - 5) + 3(x - 5) = 0 \\ = > (3x + 3)(x - 5) = 0 \\ = > 3x + 3 = 0 \\ = > 3x = - 3 \\ = > x = - \frac{3}{3} \\ = > or \\ = > x - 5 = 0 \\ = > x = 5$