Answer:
The given expression at a = 2 , b = 5 and c = 4 is 37.
Step-by-step explanation:
Given : expression
We have to evaluate the given expression at a = 2 , b = 5 and c = 4
Consider the given expression
Substitute, a = 2 , b= 5 and c = 4
We have,
Simplify, we have,
We get,
= 37
So, The given expression at a = 2 , b = 5 and c = 4 is 37.
x=9 x=-1
x²-8x-9=0 a=1 b=-8 c=-9
you have to use the quadratic formula to get the values.