What must be added to 5x²y + xy -3x + 10 to get 7x -2 + 6x²y – 5xy
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Answer:
z = - 1x²ý + 6xy - 9x -12
Step-by-step explanation:
Let the unknown number be z,
so, 5x²y + xy - 3x + 10 + z = 7x - 2 + 6x²y - 5xy
=5x²y - 6x²y + xy + 5xy - 2x - 7x + z = -10 -2
= - 1x²ý + 6xy - 9x + z = -12
= +z = - 1x²ý + 6xy - 9x -12
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