What should be subtracted from 15x² - 6y + xy + 19 to obtain 3x' -1 2y + 4xy - 31?
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Answer:
12x² + 6y - 3xy + 50
Step-by-step explanation:
Let a should be subtracted from 15x² - 6y + xy + 19 to get 3x² -1 2y + 4xy - 31.
15x² - 6y + xy + 19 - a = 3x² -1 2y + 4xy - 31
=> a = (15x² - 6y + xy + 19) - (3x² -1 2y + 4xy - 31)
=> a = 15x² - 6y + xy + 19 - 3x² + 12y - 4xy + 31
=> a = 15x²-3x² + 12y-6y - 4xy+xy + 19+31
=> a = 12x² + 6y - 3xy + 50
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