Add the expression: 2x2 – 3y2, 5x2 + 6y2, -3x2 – 4y2

1.	Add the expression: 2x2 – 3y2, 5x2 + 6y2, -3x2 – 4y2
Answer» 2x² – 3y², 5x² + 6y², -3x² – 4y² Required sum, = (2x² – 3y²) + (5x² + 6y²) + (-3x² – 4y²) Collecting like terms, = 2x² + 5x² – 3x² – 3y² + 6y² – 4y² Adding like terms, = (2 + 5 – 3)x² + (– 3 + 6 – 4)y² = 4x² – y²

Answer»

2x² – 3y², 5x² + 6y², -3x² – 4y²

Required sum,

= (2x² – 3y²) + (5x² + 6y²) + (-3x² – 4y²)

Collecting like terms,

= 2x² + 5x² – 3x² – 3y² + 6y² – 4y²

Adding like terms,

= (2 + 5 – 3)x² + (– 3 + 6 – 4)y²

= 4x² – y²

Discussion

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