Question

What should be added to 4 x square - 5 x y + 7 to get minus 3 x square + 4 x y - 5 ?

Answer 1

Step-by-step explanation:

Let the expression be X

Then,

(4x² - 5xy + 7) + x = 3x² + 4xy -5

x = ( 3x² + 4xy - 5) - (4x² - 5xy + 7)

x = 3x² + 4xy - 5 - 4x² + 5xy - 7

x = -x² + 9xy - 12

There fore, the expression -x² + 9xy - 12 should be added to 4x² - 5xy + 7 to get 3x² + 4xy - 5

Answer 2

x = 8xy+2-9xy^2

Step by step explanation

1st equation + x= 2nd equation

x = 2nd - 1st

x = answer

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