document.write( "Question 1107093: One pair of integers (x.y) solves \"+sqrt%28+4%2Asqrt%28+7+%29%2B11+%29=y%2Bsqrt%28+x+%29+\", find x*y. \n" ); document.write( "
Algebra.Com's Answer #854021 by MathTherapy(10801)\"\" \"About 
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document.write( "One pair of integers (x.y) solves \"+sqrt%28+4%2Asqrt%28+7+%29%2B11+%29=y%2Bsqrt%28+x+%29+\", find x*y.\r\n" );
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document.write( "                              \"sqrt%284sqrt%287%29+%2B+11%29%29\"\r\n" );
document.write( "                              \"sqrt%2811+%2B+4sqrt%287%29%29\"\r\n" );
document.write( "                    \"sqrt%2811+%2B+2%282%29sqrt%287%29%29\" ----- Replacing 4 with its PRIME factors, 2 & 2\r\n" );
document.write( "                         \"sqrt%2811+%2B+2sqrt%284%29sqrt%287%29%29\" ----- Converting 2 to \"sqrt%284%29\"                 \r\n" );
document.write( "                      \"sqrt%287+%2B+4+%2B+2sqrt%287%29sqrt%284%29%29\" ---- Changing 11 to 7 + 4             \r\n" );
document.write( "     \"sqrt%28%28sqrt%287%29%29%5E2+%2B+%28sqrt%284%29%29%5E2+%2B+2sqrt%287%29sqrt%284%29%29\" ---- Converting \r\n" );
document.write( "The above is in the form: \"%28a+%2B+b%29%5E2\", with \"system%28matrix%282%2C3%2C+a%2C+being%2C+sqrt%287%29%2C+b%2C+being%2C+sqrt%284%29%29%29\", and so:\r\n" );
document.write( "\"sqrt%28%28sqrt%287%29%29%5E2+%2B+%28sqrt%284%29%29%5E2+%2B+2sqrt%287%29sqrt%284%29%29\" then becomes: \"sqrt%28%28sqrt%287%29+%2B+sqrt%284%29%29%5E2%29\" \r\n" );
document.write( "                                                                                \"sqrt%287%29+%2B+sqrt%284%29\" ----- Cancelling SQUARE and SQUARE ROOT\r\n" );
document.write( "                                                                                \"sqrt%287%29+%2B+2\"\r\n" );
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document.write( "√(4√(7+11)) = \"sqrt%287%29+%2B+2\", is in the form: y + √x, with y = 2, and x = 7. Therefore, x*y = 7(2) = 14. 
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