SOLUTION: If h(x)=x^2-5x+4, i) express h(2a)-h(a) in terms of a. ii) find values of 'a' for which h(a)=0 iii) express h(a^2)+h(a) in terms of 'a'.

Algebra ->  Absolute-value -> SOLUTION: If h(x)=x^2-5x+4, i) express h(2a)-h(a) in terms of a. ii) find values of 'a' for which h(a)=0 iii) express h(a^2)+h(a) in terms of 'a'.      Log On


   



Question 1133053: If h(x)=x^2-5x+4,
i) express h(2a)-h(a) in terms of a.
ii) find values of 'a' for which h(a)=0
iii) express h(a^2)+h(a) in terms of 'a'.

Answer by josgarithmetic(39623) About Me  (Show Source):
You can put this solution on YOUR website!
(i) is a matter of substitution and then simplify.

(iii) is a matter of subsitution.

You can do these yourself.


(ii)
You only need to substitute here for a.
x=a
-
h%28a%29=a%5E2-5a%2B4=0
-
a%5E2-5a%2B4=0
%28a-1%29%28a-4%29=0
system%28either%2Ca=1%2Cor%2Ca=4%29