document.write( "Question 585091: For r(x) = 10x^2-19x-5 find all values of r(a)=-11.
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document.write( "My problem with this is i cannot factorize it. I have gotten to this point:
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document.write( "r(a)=10a^2-19a-5
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document.write( "10a^2-19a-5-11
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document.write( "10a^2-19a+6=0. \r
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document.write( "When i multiply 10*-5 i get - 50, i cannot find factors in that for -19
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document.write( "I also tried 10*6. The factors i get -15+-4. But when i work the equation and get the answers and plug them into the first problem it does not equal to -11. Please help me. Thank you \n" );
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Algebra.Com's Answer #373093 by richwmiller(17219)![]() ![]() You can put this solution on YOUR website! Not 10a^2-19a-5-11 but \n" ); document.write( "10a^2-19a-5=-11 \n" ); document.write( "10a^2-19a-5+11=0 \n" ); document.write( "10a^2-19a+6=0 \n" ); document.write( "(2x-3)*(5x-2)=0 \n" ); document.write( "(2x-3)=0 \n" ); document.write( "2x=3 \n" ); document.write( "x=3/2 \n" ); document.write( "(5x-2)=0 \n" ); document.write( "5x=2 \n" ); document.write( "x=2/5 \n" ); document.write( "Both work. \n" ); document.write( " \n" ); document.write( " |