Posted by **Anonymous** 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 -
**rbowh**, 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 -
**Anonymous**, Tuesday, April 9, 2013 at 4:31pm
Yes, I know how to do it from now. Thank you.

- Algebra -
**rbowh**, Tuesday, April 9, 2013 at 4:33pm
Great!

- Algebra -
**Anonymous**, Wednesday, February 17, 2016 at 7:49pm
no i don't understand still

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