Question

find the following products and verify the result for x =-1 y=-2 (1) (x square y - 1)(3 - 2 x square y)​

Answer 1

$x = - 1 \\ y = - 2 \\ ( {x}^{2} y - 1)(3 - 2 {x}^{2} y) \\ ( - 2 - 1)(3 + 4) \\ - 3 \times 7 \\ - 21$