1. The factorisation 1 + 16x + 64x² is

2. The factorisation x² + x + \(\frac{1}{4}\) is

3. The value of 99² is

4. The value of 49² is

5. The factorisation of (\(\frac{x^2}{y^2}\) -2+\(\frac{y^2}{x^2}\)) x ≠ 0, y ≠ 0 is

6. The value of \(\frac{0.73×0.73×-0.27×0.27}{0.73-0.27}\) is

7. The factorisation of x² - 9 is

8. The factorisation of 36x²y² - 1 is

9. The value of \(\frac{0.564×0.564×-0.436×0.436}{0.564-0.436}\) is

10. The value of (0.68)² - (0.32)² is