Hey there!
How do we solve this ?
We substitute the value of -2 instead of x
f ( -2 ) = ( -2 )² + 4 ( -2 ) + 9
f ( -2 ) = 4 - 8 + 9
... f ( -2 ) = 13 - 8
... f ( -2 ) = 5
Hence, the required answer is 5
Hope my answer helps!
