Question

subtract 6xy+4x2-4y2-4 from x2-3xy+7y2+5

Answer 1

Answer:

$3x^{2}-11y^{2} + 9xy - 9$

Step-by-step explanation:

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

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

$9xy+3x^{2}-11y^{2} - 9$

$3x^{2}-11y^{2} + 9xy - 9$

Answer 2

Answer:

3x²- 13y² + 9xy -9

Step-by-step explanation:

(6xy + 4x²-4y²-4) - (x²-3xy+7y²+5)

As we know that terms with same degree can be added or subtracted.

Therefore, collect like terms in seperate brackets.

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

= 3x²- 13y² + 9xy -9                    (Answer)