Question

3x2-2x-5. factorise​

Answer 1

Step-by-step explanation:

$= > 3 {x}^{2} - 2x - 5 \\ \\ \: \: \: - 5 \times 3 = - 15 = ac \\ \\ \: \: \: \: \: \: \: \: - 5 + 3 = - 2 = b \\ \\ = > 3 {x}^{2} + 3x - 5x - 5 \\ \\ = > 3x(x + 1) - 5(x + 1) \\ \\ = > (x + 1)(3x - 5) \\ \\ = > (x + 1) \: \: and \: \: (3x - 5) \: \: is \: your \: answer$