It is proved that the value of - 3x & # 178; + 12x + 6 is always less than 0 Topics such as questions, the process should be detailed

It is proved that the value of - 3x & # 178; + 12x + 6 is always less than 0 Topics such as questions, the process should be detailed

prove:
∵-3x²+12x+6
=-3(x²-4x)+6
=-3(x²-4x+4)-6
=-3(x-2)²-6
∵-3(x-2)²