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-BARSIC- [3]
3 years ago
7

PLS GIVE RIGHT ANSWER THE ANSWER IS NOT 17 IF U GET IT PLZ HELP!!!! M4+ 1/m4 , if m− 1/m =3.

Mathematics
1 answer:
artcher [175]3 years ago
7 0

Answer:

119

Step-by-step explanation:

I believe you meant the question to be " m^4 + 1 / m^4, if m - 1 / m = 3. "

I presume that we want to take this second equation at hand here, and " simplify " it further. After doing so this first expression will have a value with respect to the simplified value of the equation, and, plugging in it's value we can solve for the expression (  m^4 + 1 / m^4. )

m - 1 / m = 3 - Take each value squared on either side of the equation,

( m - 1 / m )^2 = 3^2 - Simplify,

( m - 1 / m )^2 = 9

If you don't know how to expand expressions such as the one in the third step, " ( m - 1 / m )^2 " here is a quick recap. Remember that ( a - b )^2 = a^2 - 2ab + b^2. Therefore,

( m - 1 / m )^2 = m^2 - 2( m )( 1 / m ) + ( 1 / m )^2,\\( m - 1 / m )^2 = m^2 - 2 + 1 / m^2

Now let's continue,

m^2 - 2 + 1 / m^2 = 9 - Add 2 on either side,

m^2 + 1 / m^2 = 11

_______________

So now we have the " simplified equation " as you can say, for the equation. Let's " simplify " the expression now,

m^4+1/m^4 = 75+4(m^2+1/m^2) - Substitute the value of 11,

m^4+1/m^4 = 75+4(11),\\m^4 + 1 / m^4 = 119

Solution = 119

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