If x = 3 - 2√2 , then find the value of ( x^2- 1/x^2)
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what does ^ mean?
power
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(step 1)1/x
=>1/3-2√2
=>3+2√2/9-8
=>3+2√2
(step 2)1/x^2
=>(3+2√2)^2
=>9+12√2+8
=>17+12√2
(step 3)x^2
=>(3-2√2)^2
=>9-12√2+8
=>17-12√2
(Final step)x^2+1/x^2
=>17-12√2-17+12√2
=>0
=>1/3-2√2
=>3+2√2/9-8
=>3+2√2
(step 2)1/x^2
=>(3+2√2)^2
=>9+12√2+8
=>17+12√2
(step 3)x^2
=>(3-2√2)^2
=>9-12√2+8
=>17-12√2
(Final step)x^2+1/x^2
=>17-12√2-17+12√2
=>0
MATH
OR
If both (x - 2) and (x -1/2) are factors of px^2+ 5x + r , show that p = r.
12 MINS AGO
I am sorry I am just a class 8 student and solving this is out of my reach
OH
i can answer it
:))
which class r u in?
a square +2ab+b square=a+b whole square
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