Normally, I would answer this question, but I have coincidentally found somewhere else where this exact question was asked and answered, so I'll redirect you here:
https://web2.0calc.com/questions/the-zeros-of-the-function-f-x-2x-2-4x-6-are
Normally, I would answer this question, but I have coincidentally found somewhere else where this exact question was asked and answered, so I'll redirect you here:
https://web2.0calc.com/questions/the-zeros-of-the-function-f-x-2x-2-4x-6-are