document.write( "Question 202646: Base of a triangle is 4cm greater than the height. The area is 30cm^2\r
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document.write( "Find the height and the length \n" );
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Algebra.Com's Answer #152879 by rajagopalan(174)![]() ![]() You can put this solution on YOUR website! Let height=x \n" ); document.write( "then base=x+4 \n" ); document.write( "area=1/2*b*h \n" ); document.write( "=(1/2)*(x)*(x+4) \n" ); document.write( "=1/2(x^2+4x) \n" ); document.write( "1/2(x^2+4x)=30 \n" ); document.write( "x^2+4x=30*2 \n" ); document.write( "x^2+4x-60=0 \n" ); document.write( "x^2+10x-6x-60=0 \n" ); document.write( "x(x+10)-6(x+10)=0 \n" ); document.write( "(x-6)(x+10)=0 \n" ); document.write( "giving x=6 or -10 \n" ); document.write( "Ignoring negative value \n" ); document.write( "we get x=6 \n" ); document.write( "Answer: \n" ); document.write( "Height=6 \n" ); document.write( "Base=10 \n" ); document.write( "Verification: \n" ); document.write( "Area=1/2*b*h \n" ); document.write( "=1/2*6*10 \n" ); document.write( "=3*10 \n" ); document.write( "=30 sq units \n" ); document.write( "okay \n" ); document.write( " |