Question

the two adjacent sides of a rectangle are 3x²-2y² and x²+3xy. find its perimeter​

Answer 1

Step-by-step explanation:

$let \: l = {x }^{2} + 3xy \\ b = 3 {x}^{2} - 2 {y}^{2} \\ perimeter \: = 2(l + b) \\ = 2( {x}^{2} + 3xy + 3 {x}^{2} - 2 {y}^{2} ) \\ = 2(4 {x}^{2} + 3xy - 2 {y}^{2} ) \\ = 8 {x}^{2} + 6xy - 4 {y }^{2} \\ = = = = = = = = = = =$