Question

Simplify: 5x²-[xy - {7x²-(xy - x² )}]
Need full Solution​

Answer 1

Answer: -3x² - 2xy

Step-by-step explanation:

5x²-[xy - {7x²-(xy - x² )}]

= 5x² - (xy - (7x² - xy + x²))

= 5x² - (xy -(8x² - xy ) )

= 5x² - (xy -8x² + xy  )

= 5x² -(-8x² +2xy)

= 5x² - 8x² -2xy

= -3x² - 2xy

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Answer 2

Step-by-step explanation:

$= 5 {x}^{2} - (xy - (7 {x}^{2} - (xy - {x}^{2} ) ))\\ = 5 {x}^{2} - (xy - (7 {x}^{2} - xy + {x}^{2} )) \\ = 5 {x}^{2} - (xy - 7 {x}^{2} + xy - {x}^{2} ) \\ = 5 {x}^{2} - xy + 7 {x}^{2} - xy + {x}^{2} \\ = 13 {x}^{2} - 2xy$