It means you have to solve the problem in parentheses first.
ex: 2X4+5= 13; 2X (4+5) = 18. The answer is different because
you have to solve the problem in the Order of Operations.
1) Parentheses
2) Exponents like 22
3) Multiplication
4) Division
5) Addition
6) Subtraction
PEMDAS or Please Excuse My Dear Aunt Sally.
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Parentheses are brackets which are rounded kind. Like the one below: ( ..... )
No. Parentheses have no direct effect on the sign of a number.
the number with the variable. For example, in 6x, the coefficient is 6.
maybe it is question 1 and question 2
HL in math mean hypotenuse leg