Question

tomorrow is my test help me plz

answer this question time wasters

solve it plz on copy ​​

Answer 1

Answer:

b

Step-by-step explanation:

x^2 +1/x^2 =7

(x^2-1/x^2)^2=(x^2+1/x^2)^2-4 x^2"1/x^2

=7^2 -4

=49-4=45

x^2-1/x^2 = sqrt(45)= 3 sqrt(5)

b

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