3x² + 4 = x → the second one on list
for a quadratic equation in standard form
ax² + bx + c = 0 ( a ≠ 0 )
the solutions can be found using the quadratic formula
x = ( - b ± √( b² - 4ac ) ) / 2a
given 1 ± √ (- 1)² - 4(3)(4) / 2(3) then by comparison
a = 3, b = - 1 and c = 4
substitute these values into the standard form equation gives
3x² - x + 4 = 0 ⇒ 3x² + 4 = x
