Question

Number of rational roots of 7x2 + 9x + 2 = 0 is​

Answer 1

Answer:

$7 {x}^{2} + 9x + 2 = 0$

$7 {x}^{2} + 7x + 2x + 2 = 0$

Common

$7 x(x + 1) + 2(x + 1) = 0$

$(7x + 2) \: (x + 1) = 0$

$(7x + 2) = 0 \\ 7x = - 2 \\ x = \frac{ - 2}{7}$

$(x + 1) = 0 \\ x = - 1$

$x = \frac{ - 2}{7} \: and - 1$

Hope its help u