1. (x2 - y2) × (x2 + y2) = ______

2. Using identity find 201 x 199

3. Find 872 - 132

4. Find (102)2 - (98)2

5. The square of x2 - 2y2 is ______

6. (x−5)(x−6)

7. (a−5)(2a−9)\left(a-5\right)\left(2a-9\right)(a−5)(2a−9) is of the form

8. z2 +(c + d)z + cd

9. The product of 93x99 is

10. (x - 8) ( x - 8) = ______