Question

what should be added to 5x²y - 3xy + 2y²x - 9 to get 7x²y + xy - 3y²x - 7​

Answer 1

Answer:

$\huge\underline\mathfrak\pink{solution}$

let's put X

so,

= (X) + (5x²y-3xy+2y²x-9) = 7x²y+xy-3y²x- 7

= X= (7x²y+XY+3y²x-7) - (5x²y-3xy+2y²x-9)

= X = 2x²y- 2xy-5y²x+2

>>>hence, " 2x²y - 2xy -5y²x +2 will added to

"5x²y- 3xy +2y²x -9" to get 7x²y +xy -3y²x -7

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Answer 2

Answer:

Oscillation is the repetitive variation, typically in time, of some measure about a central value (often a point of equilibrium) or between two or more different states. ... Familiar examples of oscillation include a swinging pendulum and alternating current.