Because: (9-x)(9-x) = 81-18x+x^2
Dire.
The value of X after simplifying fully xsquared -16 3xsquared plus 10x -8 is either 2 or 4.
(x + 4)(x + 1)
(x + 9)(x + 4)
x+y
7
(x - 7)(x + 2)
It is: 3x
It is: 2xsquared+14x-9
Quadratic - the degree is two.
-1
-2