reread the thread and try again.Ventole wrote:Firstly, yes, it is. There is no need to enclose the 1*2 in parantheses because multiplication takes higher precedence than addition. It is true 5.1 + (1*2) + 2 would be clearer but the parantheses would not be needed.DarkWater wrote: 5.1+1x2+2 is not a valid expression.
Secondly, it was a equation he included in his first post, not an expressionNotice the '='?5.1+1 x 2+2=?
the 5.1 could either mean question 5. and a natural number 1
or it could mean 5.1 as the natural number 5 and rational number .1 or 1/10th.
Which means the expression in the equation of 5.1 or 1 is invalid.
The only way to solve this problem is too enclosed the two systems to include a "rational" number and "imaginary" number.
This can be expressed by a complex number where real part can be expressed by zero.
And yes she noticed the = but could not closed the system because of the invalid expression in the equation.