Question

question is of quadratic equations of 10 std practice set 2.4 is 2x2 +x-1/5=0​

Answer 1

$\large { \underline{answer}} \\ \\ \large \implies \green{ \boxed{x = \frac{ - 5 \: \pm \: { \sqrt{65} } }{20} }} \\ \\ \large \implies{ \underline{step \: \: by \: \: step \: \: explanation}} \\ \\ \large \implies{2 {x}^{2} + x - \frac{1}{5} = 0} \\ \\ \large \implies{10 {x}^{2} + 5 - 1 = 0} \\ \\ \large \implies{ \boxed{d \: = \: b {}^{2} - 4ac}} \\ \\ \large \implies{ {(5)}^{2} - 4(10)( - 1) = 0} \\ \\ \large \implies{25 \: + \: 40 = 65} \\ \\ \large \implies{x \: = \: \frac{ - b \: \pm \: \sqrt{d} }{2a} } \\ \\ \large \implies{ \boxed{x \: = \: \frac{ - 5 \: \pm \: \sqrt{65} }{20} }}$