Beck Wheeler

05/14/2023 · Escuela secundaria superior

Select the correct simplification method for: \[ \begin{array}{l}\left(0.3 x^{3}+\mathbf{2 . 1} x^{2}-\mathbf{1 . 7}\right)-\left(-\mathbf{3 . 2} x^{3}+\mathbf{1 . 3 x - 2 . 9 )}\right. \\ \text { (A) }=0.3 x^{3}+2.1 x^{2}-1.7+3.2 x^{3}-1.3 x+2.9=3.5 x^{3}+2.1 x^{2}-1.3 x+1.2 \\ \text { (B) }=0.3 x^{3}+2.1 x^{2}-1.7+3.2 x^{3}+1.3 x-2.9=3.5 x^{3}+2.1 x^{2}+1.3 x-4.6 \\ \text { (C) }=0.3 x^{3}+2.1 x^{2}-1.7+3.2 x^{3}+1.3 x-2.9=6.9 x^{9}-4.6 \\ \text { (D) }=0.3 x^{3}+2.1 x^{2}-1.7+3.2 x^{3}-1.3 x+2.9=4.3 x^{9}+1.2\end{array} \]