It is proved by matching method that no matter what the value of X is, the value of 12x-3x & # 178; - 13X = 0 is always less than 0

It is proved by matching method that no matter what the value of X is, the value of 12x-3x & # 178; - 13X = 0 is always less than 0

The question has told us that it is equal to zero, but also let us prove that it is less than zero?
12x-3x²-13x=0
-3x²-x=0
3x²+x=0
x(3+x)=0
x1=0
x2=-3