Answer:
9z^2+4x+1
Step-by-step explanation:
Remove parentheses.
7{x}^{2}+4x-1+2{x}^{2}+2
7x
2
+4x−1+2x
+2
2 Collect like terms.
(7{x}^{2}+2{x}^{2})+4x+(-1+2)
(7x
+2x
)+4x+(−1+2)
3 Simplify.
9{x}^{2}+4x+1
9x
+4x+1
