Question

5. Factorise : x + 3x2 + 3x - 63​

Answer 1

Answer:

x + 3×2 + 3x - 63

:- x + 6 +3x - 63

:- x + 57 + 3x

Answer 2

Step-by-step explanation:

$x + 3x ^{2} + 3x - 63 \\ = {3x}^{2} + 4x - 63 \\d = {b}^{2} - 4ac \\ = {4}^{2} - 4 \times 3 \times( - 63) \\ = 16 + 756 \\ = 772 \\ \\ \\ \alpha = ( - b + \sqrt{d} \div 2a) \\ = - 4 + \sqrt{772} \div( 2 \times 3) \\ = - 4 + 2 \sqrt{193} \div 6 \\ \\ = - 2 + \sqrt{193} \div 3$