Verified answer

Answer:

11x^2 − 12xy + 2y^2

Step By Step Explanation:

= 14x^2−7xy−2y^2+(−5x)(y)+4y^2−3x^2

= 14x^2 +− 7xy +− 2y^2 +− 5xy + 4y^2 +− 3x^2

• Combine Like Terms: (It is a shortcut don't apply this trick)

= 14x2+−7xy+−2y2+−5xy+4y2+−3x2

= (14x2+−3x2)+(−7xy+−5xy)+(−2y2+4y2)

=  11x^2 − 12xy + 2y^2

Answer:

Step-by-step explanation:

• please check the attached file