(3a²++2a²)
do you know the answer

Remark

The key to this one is just to remove the brackets. Be very careful with the right hand bracket.

Remove the brackets.

3a^2 + 1 - 4 - 2a^2 Notice the minus sign affects both the 4 and the 2a^2

3a^2 - 2a^2 = a^2

+ 1 - 4 = - 3

Answer

a^2 - 3

2 sqrt(2x-1)

Step-by-step explanation:

f(x) = sqrt( x+9)

g(x) = 8x-13

f(g(x))

place the function g(x) in for x in f(x)

f(g(x)) = sqrt(8x-13+9)

Combine like terms

f(g(x)) = sqrt(8x-4)

Factor out 4

f(g(x)) = sqrt(4*(2x-1)

           2 sqrt(2x-1)