Question

please help me friends​

Answer 1

Answer:

1)(3/8)^-2 ×(4/5)^-3

(8/3)² ×(5/4)³

64/9 ×125/64

125/9

2)√1.96=1.4

3)x -1/x =6

(x-1/x)²=x²+1/x²+2(x)(1/x)

(6)²=x²+ 1/x²+2

36=x²+ 1/x² +2

36-2=x² + 1/x²

34=x² +1/x²

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