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Posted by on Tuesday, April 9, 2013 at 4:22pm.

A small painting has an area of 400 cm^2. The length is 4 more than 2 times the width. Find the dimensions of the painting. Solve by completing the square. Round answers to the nearest tenth of a centimeter.

  • Algebra - , Tuesday, April 9, 2013 at 4:31pm

    let x = width
    2x + 4 = length
    A = lw
    A = x(2x + 4)
    400 = x(2x + 4)
    400 = 2x^2 + 4x
    200 = x^2 + 2x
    x^2 + 2x = 200
    do you know how to complete the square?

  • Algebra - , Tuesday, April 9, 2013 at 4:31pm

    Yes, I know how to do it from now. Thank you.

  • Algebra - , Tuesday, April 9, 2013 at 4:33pm

    Great!

  • Algebra - , Wednesday, February 17, 2016 at 7:49pm

    no i don't understand still

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