Question

how much bigger is 7x2y2 -16x2 -8x2y than -3x2+4x2y-9xy​

Answer 1

QUESTION:

$how \: much \: bigger \: is \: \\ \\ 7 {x}^{2} {y}^{2} - 16 {x}^{2} - 8 {x}^{2} y \: \: \\ than \: \: - 3 {x}^{2} + 4 {x}^{2} {y}^{2} - 9xy$

ANSWER:

$= ( - 3 {x}^{2} + 4 {x}^{2} y - 9xy) \\ - \\ (7 {x}^{2} {y}^{2} - 16 {x}^{2} - 8 {x}^{2} y)$

$= - 3 {x}^{2} + 16 {x}^{2} + 4 {x}^{2} y + 8 {x}^{2} y - 9xy - 7 {x}^{2} {y}^{2}$

$= 13 {x}^{2} + 12 {x}^{2} y - 9xy - 7 {x}^{2} {y}^{2} \\ \\ so \: the \: answer \: is \: \\ \\ 13 {x}^{2} + 12 {x}^{2} y - 9xy - 7 {x}^{2} {y}^{2}$