Question

the number of terms in the algebraic expression ( 2x² + y² -9 ) - ( x² + y² - 19 )​

Answer 1

Answer:

$(2 {x}^{2} + {y}^{2} - 9) \: - \: ( {x}^{2} + {y}^{2}- 19) \\ \\ 2 {x}^{2} + { \cancel{ {y}^{2} }} - 9 \: \: - {x}^{2} \: \: { \cancel{- {y}^{2} }} + 19 \\ \\ {x}^{2} + 10$