Question

4. (a + b)(a - b) 5. (y - 3)(y + 3) 6. (x-7)(x + 7) 7. (6-a) (6 + a) 8. (10-t)(10 +t)​

Answer 1

4. а^2-b^2
5. y^2-9
6. x^2-49
7. 36-a^2
8. 100-t^2