Wherever you see an x, replace it with -2,
So f(-2) = 2(-2^2) -15
= (2x4)-15
= -7
dropped $3 means "-3", increased $6 means "+6"
the price dropped twice so 2(-3) and increased once by 6
so, 2(-3) + 6 = 0
the change in price is $0
Ill Say Probably 49 Different Type Of Sums.
3x/8+1=9/8
3x/8+1(8/8)=9/8
3x/8+8/8=9/8
3x+8=9
3x=1
x=1/3
