Question

if h(x)=x^2-1, and h(2a)=35, what is the value of a?

Answer 1

h(2a) = (2a)^2-1 = 35

solve for a

Answer 2

@MrNood i got 9 and the answer is a= {3,-3}

Answer 3

4a^2= 36

a^2=9
a= +/- 3

I'm not sure about your notation (do you mean the set of {3,-3}?)

Answer 4

yeah the set of

Answer 5

good - well done.

Do you understand how I went from h(x) to h(2a)?

Answer 6

oh yeah i got it i just forgot the ^2 part thanks!