We could use any letter.

Example of quadratic expression. Sometimes a quadratic expression is NOT written in its standard form. These are the two points where the parabola will cut the horizontal axis. Quadratic Formula Examples When To Use The Quadratic Formula Polynomials expressions with many terms can have linear square and cubic values.

Confusion enters when we look at the word quadratic because it implies four of something like a quadrilateral. A quadratic equation is a polynomial whose highest power is the square of a variable x 2 y 2 etc. Balls Arrows Missiles and Stones When you throw a ball or shoot an arrow fire a missile or throw a stone it goes up into the air slowing as it travels then comes down again faster and faster.

Check the sign of the coefficient of x2 that is the sign of a. Now x2 x12 x3x4 See Topic 7 Section 2 x3x4 0 ie. There is a formula for solving this.

Here a and b are the coefficients of x 2 and x respectively. Solving quadratic equations using a formula Consider the general quadratic equation ax2 bxc 0. And a Quadratic Equation tells you its position at all times.

For example 5x2-13x-6 has a factor of x-3 and 5x2. If a 0 the parabola will open downward. It is so important that you should learn it.

1 on a question Give an example of quadratic expression where a 1. Some quadratic expression has factors. The quadratic expression in variable x x is ax2 bxc a x 2 b x c.