Answer:
-3 + x or x -3
Step-by-step explanation:
Start with the brackets one by one
3(x + 3) Multiply the 3 outside the bracket to everything inside
3 × x = 3x
3 x 3 = 9
3x + 9 -2(x + 6)
-2(x + 6) = -2x - 12
3x + 9 -2x - 12 = x -3
It might be C. I used the process of elimination, so I'm not so certain
Answer:
11*n
Step-by-step explanation:
11 is each bookshelf, n is an unknown number, try to imagine it as 2. You would multiply 11 by two to get total number of books.
Hey there!
x^2-18x+79=0
To complete the square, you need to take half of 18, and square it. You have to have complete squares for C for this to work.
-18/2= -9
-9^2= 81
(x^2-18x+81)-81+79=0
The factor is 9, and the -18 is negative.
(x-9)^2 -81+79=0
Add the numbers.
-81+79= -2
(x-9)^2=-2
Now, unsquare both sides.
√(x-9)^2= √-2
Negative square roots do not exist, so it is an imaginary number. Put tha tin front of the 2.
(x-9)=± i√2
x= -9±i√2 <=== the answer
I hope this helps!
~kaikers