Problem: for what value of â € œ k â €  will the equation ( 2 kx 2 + 5 kx + 1 ) = 0 have equal roots ?
Rationale: "for a 2 nd degree equation ax 2 + bx _ c = 0 has equal roots the condition is b 2 - 4 ac = 0 in the given equation ( 5 k ) ^ 2 - 4 * 2 k * 1 = 0 by solving this equation we get k = 0 , k = 8 / 25 answer : c"
annotated_formula: divide(power(2, add(2, 2)), power(5, 2))