2. List the like terms in each of the following:
i) 2a2b2 , 6a2b, 2ab2 , -3a2b2 , 7ab2 , -9a2b

Areflection of shape i across the y-axis, followed by a , and then a translation left 6 units and down 4 units confirms congruence between shape i and shape ii. alternatively, a of shape ii about the origin, followed by a reflection across the y-axis, and then a translation right 4 units and up 6 units confirms congruence between shape ii and shape i.