Question

What is the Square of 9x-7xy​

Answer 1

Step-by-step explanation:

Using identity

$(x - y) {}^{2} = x {}^{2} + 2xy + y {}^{2}$

$(9x - 7xy) {}^{2} = (9x) {}^{2} - 2 \times 9x \times 7xy + (7xy) {}^{2} \\ = 81x {}^{2} - 126x {}^{2} y + 49x {}^{2} y {}^{2}$

Hope it helps you