Answer:
Hi there! The answer is C.
(3 {x}^{2} + 3 ) + (3 {x}^{2} + x+ 4) =(3x
2
+3)+(3x
2
+x+4)=
First we work out the parenthesis, which is easy, because we can just remove them.
3 {x}^{2} + 3 + 3 {x}^{2} + x + 4 =3x
2
+3+3x
2
+x+4=
Now rearrange our expression (in order to collect the terms later).
3 {x}^{2} + 3 {x}^{2} + x + 3 + 4 =3x
2
+3x
2
+x+3+4=
Now we can collect the terms.
6 {x}^{2} + x + 76x
2
+x+7
The answer is C.
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Explanation:
this is your correct answer