Question

Using suitable identity find the following

1) ( y -3) 2​

Answer 1

Answer:

$(y - 3) {}^{2} \\ (a - b) {}^{2} = \\{a}^{2} - {b}^{2} + 2ab \\ (y) {}^{2} - (3) {}^{2} + 2(y)(3) \\ y {}^{2} - 9 + 6y$