Question

Simplify: (3x2 − 8xy + y2) − (7x2 − 4xy − 5y2)

−4x2 − 4xy + 6y2
−4x2 + 4xy + 4y2
−4x2 + 12xy − 4y2
−4x2 − 12xy + 6y2

Answer 1

distribute the parenthesis
combine all like terms

Answer 2

remember when you subtract a negative it has the net effect of adding

Answer 3

negative times negative is positive

Answer 4

After distributing comebine like terms:
\[\ 3x^2+−8xy+y^2+−7x^2+4xy+5y^2\]
\[\ (3x^2+−7x^2)+(−8xy+4xy)+(y^2+5y^2)\]
\[\ −4x^2+−4xy+6y^2\]

Answer 5

Please learn how to express exponentiation properly. (3x2 − 8xy + y2) − (7x2 − 4xy − 5y2) is vague. AloneS has done a nice job of using superscripts to denote exponentiation.