Answer:
[tex]3a {b}^{2} + {a}^{2} - {b}^{2} - ab[/tex]
Step-by-step explanation:
[tex] { - 2a}^{2}b + {a}^{2} - 5ab + 3a {b}^{2} - {b}^{2} + 2( {a}^{2} + 2ab)[/tex]
[tex] - 2 {a}^{2} b +{a}^{2} - 5ab + 3a {b}^{2} - {b}^{2} + 2 {a}^{2} b + 4ab[/tex]
[tex]0 {a}^{2} b + {a}^{2} - ab + 3a {b}^{2} - {b}^{2} [/tex]
[tex]3a {b}^{2} + {a}^{2} - {b}^{2} - ab[/tex]
