Algebraic Expressions and Identities-Important Questions

HIGH ORDER THINKING SKILLS
ALGEBRAIC EXPRESSIONS AND IDENTITES
1.  Find the value of: x2 – 1/5 at x= -1.
2.  What is the value of x2 + y2 – 10 at x = 0 and y = 0?
3.  Find the product of 9a, 4ab and -2a.
4.  Simplify (a + b + c)(a + b - c).
5.  Using identities evaluate: 8.56 * 11.60.
6.  Using identities evaluate: (99)2.
7.  Simplify x(2x – 1) + 5 and find its value at x = -2.
8.  Evaluate the value of (95)2 using identities.