Question

12u×u-56u+65=0solve?

Answer 1

Answer:

u=30 or u=26 is the answer

Answer 2

Answer:

Solutions are u=5/2 and u=13/6

Step-by-step explanation:

$12u^2-56u+65 =0\\here pq=12x65 =780\\ p+q= -56$

by solving this, we get p=-26 q=-30

we can rearrange the above equation now

$12u^2-26u-30u+65=0\\2u(6u-13)-5(6u-13)=0\\(2u-5)(6u-13)=0$

$2u-5 =0\\u=\frac{5}{2}$

OR

$6u-13 =0\\u=\frac{13}{6}$

solutions are u=5/2 and u=13/6