Question

Find an expression for c and an expression for d in terms of a

Answer 1

c = a² + 8

d = 4a

Explanation:

(a + √8)² =

= a² + 2a√8 + 8

= a² + 4a√2 + 8

= a² + 8 + 4a√2

Compare to c + d√2

c = a² + 8

d = 4a