if a-1/a=8 and a is not = 0 find a^2-1/a^2
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Step-by-step explanation:
a-1/a = 8
⇒a-1 = 8a
⇒-1=7a
⇒a=(-1)/7
∴a² - 1 / a²
⇒(-1/7)² - 1/ (-1/7)²
⇒ (1/49) - 1 / (1/49)
⇒ 1-49/49
_______
1/49
⇒ -48/49
______
1/49
⇒ -48 × 49
_______
49
⇒ -48
Hope this helps
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