So i was working through my math book and i got to some questions about Order of Operations or BEDMAS (brackets, exponents, division, multiplication, adding, subtracting)
now im used to doing it but not with variables included i tried to figure it out but i just have no idea.
the questions are
2(x + 3)(x + 4) =
also when there is an exponent included
3(x + 3)^2 =
any help would be appreciated
2(x + 3)(x + 4) = ?
First you substitute whatever x is, then you work out the number inside the brackets(brackets first). Then you multiply them together(multiplication after).
3(x + 3)^2 = ?
First you substitute whatever x is into the equation, then you solve the brackets, then do to the power of 2, then multiply by 3.
That is called expanding the brackets.
You can use the FOIL method to expand it:
First - multiply the first value in the first bracket by the first value in the second bracket
Outer - multiply the first value in the first bracket by the last value in the second bracket
Inner - multiply the last value in the first bracket by the first value in the second bracket
Last - multiply the last value in the first bracket by the last value in the second bracket
Then multiply everything by whatever is outside of the brackets.
If you do not understand it, look up expanding brackets.