Ask Experts Questions for FREE Help !
Ask
    Madihakazi's Avatar
    Madihakazi Posts: 20, Reputation: 1
    New Member
    		  
    #1

    May 30, 2011, 06:12 AM
    Quadratic Equation
    A quadratic equation when the perimeter and diagonal of a rectangle are given.
    jcaron2's Avatar
    jcaron2 Posts: 986, Reputation: 204
    Senior Member
    		  
    #2

    May 30, 2011, 12:13 PM
    If the length and width of the rectangle are a and b, what's the formula for the perimeter?

    How about the formula for the diagonal?

    Now solve that first equation (the perimeter one) for one of the variables (e.g. a = ?). Then just substitute that value into the second equation (the diagonal one). The result will be a quadratic equation in just one variable.

    If you're still unsure what to do, try to at least answer the first two questions I posed, then post back with your results. We'll help you go from there.
    Madihakazi's Avatar
    Madihakazi Posts: 20, Reputation: 1
    New Member
    		  
    #3

    May 31, 2011, 12:43 AM
    Can u please tell me the formula for the diagonal of rectangle.
    jcaron2's Avatar
    jcaron2 Posts: 986, Reputation: 204
    Senior Member
    		  
    #4

    May 31, 2011, 05:08 AM

    The diagonal forms a right triangle with two of the sides. So it's length is just the Pythagorean theorem:



    Just substitute your value for D (the diagonal) and the solution for a or b from the perimeter equation.
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Quadratic Equation [ 2 Answers ]

The front wheels of a vehicle are 15 cm greater in circumference than the back wheels. THe back wheels make 3 revolutions more than the front wheels in a distance of 15 m. Find the circumference of the front wheels.

Quadratic equation [ 4 Answers ]

I do not know how to do this problem and would really appreciate anyone who might explain it to me. x(2x-1)=45 it's a quadratic equation.. trying to find the diminsions of a shape. Grace

Quadratic equation [ 1 Answers ]

Two numbers have a difference of 3. the sum of their squares is 89. Find the numbers. Having difficulty please help

Quadratic equation [ 1 Answers ]

how do I find 2x squared plus 5x minus 3 over x squared minus 2x minus 15 all divided by 3x squared plus x minus 2 over x squared minus 4x minus 5?

Quadratic equation [ 1 Answers ]

The local building requires that a lawn of uniform width must surround all factories. The area of the lawn must also equal area occupied by the factory.Determine the widht of lawn required for a rectangular factory that measures 120 meters X 80 meters. This is a quadratic equation word

View more questions Search