Question

Add the following: (1) 3x2 y + 4x3 y – xy 2 + x2 y 2 , 11x2 y - x 3 y + 5x2 y 2 and 5x2 y + 7x3 y – 3xy2 - x 2 y 2 . ​

Answer 1

(3x²y + 4x³y – xy² + x²y²) + (11x²y - x³y + 5x²y²) + (5x²y + 7x³y – 3xy² - x²y²)

= 3x²y + 4x³y – xy² + x²y² + 11x²y - x³y + 5x²y² + 5x²y + 7x³y – 3xy² - x²y²

= (3 + 11 + 5)x²y + (4 - 1 + 7)x³y + (-1 - 3)xy² + (1 + 5 - 1)x²y²

= 19x²y + 10x³y - 4xy² + 5x²y²

Answer 2

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