Question

if kx²+4x+1=0, find k​

Answer 1

$\small \bf \red{hey \: mate \: \: here \: is \: ur \: ans} \\ \\ \small \bf \pink{ \huge \: solution} \\ \\ \small \bf \pink{given \: that} \\ \\ \small \bf \pink{k {x}^{2} + 4x + 1 = 0 } \\ \\ \small \bf \blue{ \underline{ \underline{comparing \: to \: this \: identity}}} \\ \\ \\ \small \bf \pink{a {x}^{2} + bx + c = 0} \\ \\ \small \bf \pink{a = 1} \\ \\ \small \bf \pink{b = 4} \\ \\ \small \bf \pink{c = 1} \\ \\ \small \bf \green{using \: to \: this \: formula} \\ \\ \small \bf \pink{ {b}^{2} - 4ac = 0 } \\ \\ \small \bf \pink{ {4}^{2} - 4 \times k \times 1 = 0} \\ \\ \small \bf \pink{16 - 4k = 0} \\ \\ \small \bf \pink{16 = 4k} \\ \\ \small \bf \pink{k = \frac{16}{4} } \\ \\ \small \bf \pink{k = 4 \: \: ans}$