Step-by-step explanation:
f(x)=x²-1, f(x-1)=(x-1)²-1
=(x-1)(x-1)-1
=(x²-x-x+1)-1
=x²-2x+1-1
=x²-2x=0
x²=2x
x=2
Answer: x=7
Step-by-step explanation: Take 5 and subtract it from both side making x=7 check it by adding 7 to 5 and it does in fact equal 12.
Hope this helps ^^
Answer:
0.0009) is 9x10^-4
Step-by-step explanation:
<span>x^2 + 1 = 0
x^2 = -1
x =
x = i
:
(x^3 + 2x) = 0
Factor out x
x(x^2 + 2) = 0
x = 0</span>
