Question

Which of following is quadratic equation?<br /><br /><br />(x²+1)=(2-x)²+3<br /><br />x³-x²=(x-1)³<br /><br />2x²+3=(5+x)(2x-3)<br /><br />None<br /><br />​

Answer 1

$of the quadratic equation x2−10x+2k=0 is 5−3, find k.</p><p></p><p>A</p><p></p><p>11</p><p></p><p>B</p><p></p><p>12</p><p></p><p>C</p><p></p><p>13</p><p></p><p>D</p><p></p><p>15</p><p></p><p>EASY</p><p></p><p>Share</p><p></p><p>Study later</p><p></p><p>ANSWER</p><p></p><p>One of the root of the equation is 5−3, then the other is 5+3</p><p>Product of the roots = (5+3)(5−3)=2k</p><p>⇒25−3=2k</p><p>⇒22=2k</p><p>⇒k=11</p><p></p><p>$