Question

$-7x^{2} +18x^{2} +3x^{2} -5x^{2}$

Answer 1

Answer:

$- 7{x}^{2} + 18 {x}^{2} + 3 {x}^{2} - 5 {x}^{2}$

$21 {x}^{2} - 12 {x}^{2}$

$= 9 {x}^{2}$

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