The expression that is equivalent to 2x²+(4x-6x²)+9-(6x+3) is -4x² - 5x + 6
Given the function 2x²+(4x-6x²)+9-(6x+3)
On expansion, the expression becomes;
= 2x²+(4x-6x²)+9-(6x+3)
= 2x²+4x-6x²+9-6x-3
Collect the like terms;
2x²-6x²+4x - 9x +9-3
-4x² - 5x + 6
Hence the expression that is equivalent to 2x²+(4x-6x²)+9-(6x+3) is -4x² - 5x + 6
learn more on expansion here: https://brainly.com/question/18587401
