In elementary algebra, the quadratic formula is the solution of the quadratic equation.

$x equals fraction numerator negative b plus-or-minus square root of b squared minus 4 a c end root over denominator 2 a end fraction$

Water is made from two elements: hydrogen and oxygen. If you put the two gases together, along with energy, you get water.

$2 H subscript 2 open parentheses g close parentheses and O subscript 2 open parentheses g close parentheses equilibrium 2 H subscript 2 O open parentheses l close parentheses$

The entire formula for the surface area of a cylinder is $2 πr squared plus 2 πrh$