SOLUTION: If x is equal to 2km what would 4x^2-1 equal

Question 1207018: If x is equal to 2km what would 4x^2-1 equal

Found 2 solutions by MathLover1, math_tutor2020:
Answer by MathLover1(20849) (Show Source): You can put this solution on YOUR website!

if

then

Answer by math_tutor2020(3816) (Show Source): You can put this solution on YOUR website!

If km refers to kilometers, then,
x = 2
4x^2-1 = 4(2)^2-1
= 4*(4)-1
= 16-1
= 15

Summary:
x = 2 kilometers leads to 4x^2-1 = 15 kilometers

-------------------------------

If km in 2km doesn't refer to kilometers, and instead the k and m are separate variables, then:
x = 2km
4x^2-1 = 4(2km)^2-1
= 4(2^2k^2m^2)-1
= 4(4k^2m^2)-1
= 16k^2m^2-1

Summary:
x = 2km leads to 4x^2-1 = 16k^2m^2-1
if the "km" doesn't refer to kilometers but instead two different variables.

RELATED QUESTIONS
if f(x-1) = x� -4x+8, then f(x+2) is equal... (answered by jim_thompson5910)
i have been given the functions f(x)= 16x^2-1 and g(x)= 4x+1 but i have to find the... (answered by solver91311)
if angle 1 is equal to x + 25, and angle 2 is equal to 2x, what is... (answered by mananth)
if f(x)= 4x-x^2 and g(x)= 1/x, then (fog)(1/2) is equal to (answered by jim_thompson5910)
What if you have a question like this� 2(-2) < or equal to 3x-1 AND 3x-1 < or equal to (answered by josgarithmetic)
-4(n-1)-6n what does n equal? Another one is -6-7=4X+2-3X WHAT DOES X... (answered by Fombitz)
4-7/4x=1/2 what does x equal... (answered by fcabanski)
(((9(x+2)-3(x+3)=2(x-1)+7 what is x equal to?))) 1. (((4x+6/9-2x-6/9=12x+8/12 -x what is (answered by jim_thompson5910)
X^2+4X ----------- is less than or equal to 0 X^2-49 if you factor the bottom it (answered by checkley77)