[tex]4a + {4a}^{2} [/tex]
Step-by-step explanation:
1) Remove parentheses.
[tex]2a + {5a}^{2} + 2a - {a}^{2} [/tex]
2) Collect like terms.
[tex](2a + 2a) + ( {5a}^{2} - {a}^{2} )[/tex]
3) Simplify.
[tex]4a + {4a}^{2} [/tex]
Therefor, the answer is, 4a + 4a².
