To plug (in) a number into an equation

Plug in 5 for \(x\) into the equation

A solution to/of the equation

To solve an equation /ɪˈkweɪʒn/

To solve an inequality /ɪnɪˈkwɒləti/

To solve for \(x\)

Set each set of parenthesis equal to zero as separate equations

A system /ˈsɪstəm/ of 2 equations IN 2 unknowns

Solve a system of equations by graphing

A quadratic /kwɒˈdrætɪk/ equation

The quadratic /kwɒˈdrætɪk/ formula

The zero factor property or zero factor principle