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Q.1. Simplify (4.5a + 1.5b)2 + (4.5b + 1.5a)2
Q.2. Simplify (pq – qr)2 + 4pq2r
Q.3. Simplify (s2t + tq2)2 – (2stq)2
Q.4. Expand (xy + yz)2 using suitable identities.
Q.5. Expand (x2y – xy2)2 using suitable identities.
Q.6. Expand 
using suitable identities.
Q.7. Expand 
using suitable identities.
Q.8. Expand 
using suitable identities.
Q.9. Expand (x + 3) (x + 7) using suitable identities.
Q.10. Expand (2x + 9) (2x – 7) using suitable identities.