নিশ্চায়ক সংক্রান্ত
Find the value of kkk for which the quadratic equation (k−2)x2+2(2k−3)x+5k−6=0\displaystyle \left ( k-2 \right )x^{2}+2\left ( 2k-3 \right )x+5k-6=0(k−2)x2+2(2k−3)x+5k−6=0 has equal roots
1
3
A and B both
none of these
Since the above equation has equal roots
Hence
B2−4AC=0B^{2}-4AC=0B2−4AC=0
4(2k−3)2−4(5k−6)(k−2)=04(2k-3)^{2}-4(5k-6)(k-2)=04(2k−3)2−4(5k−6)(k−2)=0
4k2−12k+9−(5k2−16k+12)=04k^{2}-12k+9-(5k^{2}-16k+12)=04k2−12k+9−(5k2−16k+12)=0
−k2+4k−3=0-k^{2}+4k-3=0−k2+4k−3=0
Or ;
k2−4k+3=0k^{2}-4k+3=0k2−4k+3=0
(k−3)(k−1)=0(k-3)(k-1)=0(k−3)(k−1)=0
k=3k=3k=3 and k=1k=1k=1.
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?