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

Water is made from two elements - Hydrogen and Oxygen. If you put the two gases together, along with energy, you can make water.

2 H 2 g + O 2 g ⇌ 2 H 2 O l " class="Wirisformula" role="math" alt="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" width="175" height="25" style="max-width: none; vertical-align: -9px;">