Given expressions are 3x³-3x²+9 and -7+5x²+7x³
On adding them
⇛ (3x³-3x²+9 ) + (-7+5x²+7x³)
⇛ 3x³-3x²+9 -7+5x²+7x³
⇛ (3x³+7x³)+(5x²-3x²)+(9-7)
⇛(3+7)x³+(5-3)x²+(2)
⇛ 10x³+2x²+2
Ans: (3x³-3x²+9 ) + (-7+5x²+7x³) = 10x³+2x²+2
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