Question

Let a=x^2+4. rewrite the following equation I terms of a and set it to equal zero

Answer 1

For this case we have the following expression:
a = x ^ 2 + 4
Clearing x we have:
x ^ 2 = a - 4
Rewriting we have:
x = root (a-4)
Answer:
The expression written in terms of a is given by:
x = root (a-4)