Question

(19)
3. Find the product of (3x + 7y)(3x - 7y)
4. Expand (2x + 3y)​

Answer 1

Step-by-step explanation:

$(3x + 7y)(3x - 7y) \\ 9 {x}^{2} - 21xy + 21xy - 49 {y}^{2} \\ 9 {x}^{2} - 49 {y}^{2}$

Answer 2

ans 3 =(3X+7Y)(3X+7Y)

3X(3X+7Y)+7Y(3X+7Y)

9X²+21XY+21XY+49Y²

9X²+42XY+49Y²