Write each of these expressions in the form (x + p) + q or q (x + p), where p and q are constants.

Write each of these expressions in the form (x + p)² + q or q – (x + p)², where p and q are constants.

a) x² + 2x – 5

b) x² – 10x + 20 

c) x² – 4x + 1

d) 6 – 8x – x² 

e) 10 – 16x – x²  

f) x² + 20x – 45  

g) x² + 12x + 16 

h) 3 – 6x – x²