Stu: :D
OK, so I get the quadratic formula. it ain't such a tough nut rather it is more like a gentle baby. but to save upsetting it on this day of romance I'd like to resolve one thing about square rooting in maths/this formula.
assuming you are solving x2+3x+1=0
after half of the formula I have [-3 - Sqrt (+9-4)] / (2*1).. my question is simple and two part.
1) to Sqrt the 9 I must also Sqrt the 4 or calculate the sum of 9-4 then Sqrt before manipulating change from outside the Sqrt right?
You have to find 9-4 =5 and THEN take the square root.
2) please insert parenthesis to solve including signs.