document.write( "Question 821128: the area of a triangle is 18 cm^2 and the altitude is 3 cm greater than the base. find the length of the base, to the nearest hundredth of a centimetre
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Algebra.Com's Answer #493909 by TimothyLamb(4379)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "18 = b(b + 3)/2
\n" ); document.write( "18 = bb/2 + 3b/2
\n" ); document.write( "(1/2)bb + (3/2)b - 18 = 0
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\n" ); document.write( "the above quadratic equation is in standard form, with a=0.5, b=1.5, and c=-18
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\n" ); document.write( "to solve the quadratic equation, by using the quadratic formula, copy and paste this:
\n" ); document.write( "0.5 1.5 -18
\n" ); document.write( "into this solver: https://sooeet.com/math/quadratic-equation-solver.php
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\n" ); document.write( "the two real roots (i.e. the two x-intercepts), of the quadratic are:
\n" ); document.write( "b = 4.68465844
\n" ); document.write( "b = -7.68465844
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\n" ); document.write( "negative length doesn't make sense so use the positive root:
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\n" ); document.write( "answer:
\n" ); document.write( "base = 4.69 cm
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\n" ); document.write( "Solve and graph linear equations:
\n" ); document.write( "https://sooeet.com/math/linear-equation-solver.php
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\n" ); document.write( "Solve quadratic equations, quadratic formula:
\n" ); document.write( "https://sooeet.com/math/quadratic-formula-solver.php
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\n" ); document.write( "Solve systems of linear equations up to 6-equations 6-variables:
\n" ); document.write( "https://sooeet.com/math/system-of-linear-equations-solver.php \n" ); document.write( "
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