Question

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.

Answer 1

Answer:

9/5

Step-by-step explanation:

2x-1/5

then put the value of x

2x-1-1/5

-2-1/5

-2/1-1/5

then

5/5x-2/1-1/5

10/5-1/5

ans:9/5