নিশ্চায়ক সংক্রান্ত
The value (s) of kkk for which the quadratic equation kx2−kx+1=0\displaystyle kx^{2}-kx+1=0kx2−kx+1=0 has equal roots is
k=0k = 0k=0 only
k=4k = 4k=4 only
k=0,4k = 0, 4k=0,4
k=−4k = -4k=−4
For equal roots
B2−4AC=0B^{2}-4AC=0B2−4AC=0
Hence
k2−4k=0k^{2}-4k=0k2−4k=0
k(k−4)=0k(k-4)=0k(k−4)=0
k=0k=0k=0 or k=4k=4k=4
Now if K=0K=0K=0, the above equation will be 1=01=01=0 which is not true.
Hence k=4k=4k=4 is the answer.
x2+3x-4 =0 সমীকরণের মূলদ্বয়-
নিচের কোনটি সঠিক?
If ax2+bx+c=0ax^2 + bx + c = 0ax2+bx+c=0 then the roots of the quadratic equation are equal.
The roots of the equation 2a2x2;−2abx+b2=02a^2x^2 ;- 2abx +b^2=02a2x2;−2abx+b2=0 when a < 0 and b > 0 are :& ;
x2-3x+4=0 সমীকরণের মূলগুলির প্রকৃতি কিরুপ?