Question

{(3x² - 6x + 5) + (2x - 2x² + 5)} - (x² - 4x + 10) : Simplify.

Answer 1

$[ ( 3x^{2} - 6x + 5 ) + ( 2x - 2x^{2} + 5 ) ] - ( x^{2} - 4x + 10 ) \\ \\ \\ \rightarrow [ 3x^{2} - 6x + 5 + 2x - 2x^{2} + 5 ] - x^{2} + 4x - 10 \\ \\ \\ \rightarrow [ 3x^{2} - 2x^{2} - 6x + 2x + 5 + 5 ] - x^2 + 4x - 10 \\ \\ \\ \rightarrow x^{2} - x^{2} - 4x + 4x + 10 - 10 \\ \\ \\ \rightarrow 0$