Question

5x²-4y²+6y-3 from 7x²-4xy+8y²+5x-3y

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Answer 1

Step-by-step explanation:

r = 5x² - 4y² + 6y - 3

and

r' = 7x² - 4xy + 8y² + 5x - 3y

Now,

r' - r

= (7x² - 4xy + 8y² + 5x - 3y) - (5x² - 4y² + 6y - 3)

= 2x² - 4xy + 12y² + 5x - 9y + 3

Answer 2

Answer:

$2x^{2} +5x-4xy+4y^2+3y-3$

Step-by-step explanation:

$7x^{2} -4xy+8y^2+5x-3y-5x^{2} -4y^2+6y-3$

$7x^{2} -5x^{2}+5x-4xy+8y^2 -4y^2-3y+6y-3$

$2x^{2} +5x-4xy+4y^2+3y-3$