Number zero puzzle

I think of a number. When it is substituted into the expression (x − 4)(2x − 1), the result is zero. What could the number be?

Final Answer:

x1 =  4
x2 =  0.5

Step-by-step explanation:

x14=0  x1=4
2 x21=0  2x2=1  x2=21=0.5  x2=21=0.5



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