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11.6 – Solving Quadratic Equations by Factoring - PowerPoint PPT Presentation

11.6 – Solving Quadratic Equations by Factoring. A quadratic equation is written in the Standard Form ,. where a , b , and c are real numbers and . Examples:. (standard form). 11.6 – Solving Quadratic Equations by Factoring. Zero Factor Property:.

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Presentation Transcript

A quadratic equation is written in the StandardForm,

where a, b, and c are real numbers and .

Examples:

(standard form)

Zero Factor Property:

If a and b are real numbers and if ,

then or .

Examples:

Zero Factor Property:

If a and b are real numbers and if ,

then or .

Examples:

1) Write the equation in standard form.

2) Factor the equation completely.

3) Set each factor equal to 0.

4) Solve each equation.

5) Check the solutions (in original equation).

If the Zero Factor Property is not used, then the solutions will be incorrect

A cliff diver is 64 feet above the surface of the water. The formula for calculating the height (h) of the diver after t seconds is:

How long does it take for the diver to hit the surface of the water?

seconds

The square of a number minus twice the number is 63. Find the number.

x is the number.

The length of a rectangular garden is 5 feet more than its width. The area of the garden is 176 square feet. What are the length and the width of the garden?

The width is w.

The length is w+5.

feet

feet

Find two consecutive odd numbers whose product is 23 more than their sum?

Consecutive odd numbers:

The length of one leg of a right triangle is 7 meters less than the length of the other leg. The length of the hypotenuse is 13 meters. What are the lengths of the legs?

meters

meters