Question 18Square of 9x−7xy isa) 81x2+49x2y2b) 81x2−49x2y2c) 81x2+49x2y2−126x2yd) 81x2+49x2y2−63x2y

Question 18Square of 9x−7xy isa) 81x2+49x2y2b) 81x2−49x2y2c) 81x2+

1.	Question 18Square of 9x−7xy isa) 81x2+49x2y2b) 81x2−49x2y2c) 81x2+49x2y2−126x2yd) 81x2+49x2y2−63x2y
Answer» Question 18 Square of $9 x - 7 x y$ is a) $81 x^{2} + 49 x^{2} y^{2}$ b) $81 x^{2} - 49 x^{2} y^{2}$ c) $81 x^{2} + 49 x^{2} y^{2} - 126 x^{2} y$ d) $81 x^{2} + 49 x^{2} y^{2} - 63 x^{2} y$