Question

If x=2 and x=3 find a and b in 2x^3-5x^2+ax +b

Answer 1

hi friend its your answer
first put the value of x=2
then,
4^3-10^2+2a+b
-36+2a+b=0
keeping the value of x=3
6^3-15^2+3a+b
216-225+3a+b
-9+3a+b=0
eq them
-36+2a+b=-9+3a+b
then solve it a=23
b=-14