document.write( "Question 197843: 8. A rectangle has dimensions x+10 and 2x-3. Determine the value of x that gives an area of 54 cm^2.
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Algebra.Com's Answer #148336 by solver91311(24713) $\"\"$ $\"About$

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\n" ); document.write( "\n" ); document.write( "The area of a rectangle is the length times the width, so:\r
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\n" ); document.write( "\n" ); document.write( "Expand the binomials, collect like terms on the left so the quadratic is in standard form, and solve like any other quadratic equation. (Hint: It factors) You will get two roots, as is typical, but one of them will be negative. Since a negative value for a measure of length is absurd, exclude that extraneous root. The desired value will be the positive root.\r
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