Question

Solve : x* - 13x² +42 = 0​

Answer 1

Answer:

$\: \: \: \: \: {x}^{2} - 13x + 42 = 0 \\ or \: {x}^{2} - (7 + 6) + 42 = 0 \\ or \: {x}^{2} - 7x - 6x + 42 = 0 \\ or \: x(x - 7) - 6(x - 7) = 0 \\ or \: (x - 7)(x - 6) = 0$

Either | Or

x - 7 = 0 | x - 6 = 0

or, x = 7 | or, x = 0