9(x^2 (1÷x^2))-9 (x (1÷x))-52=0
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The given equation is,9(x2 + 1x2) − 9(x + 1x) − 52 = 0 .........(1)put x + 1x = y⇒(x + 1x)2 = y2⇒x2 + 1x2 + 2 × x × 1x = y2⇒x2 + 1x2 = y2 − 2Now, from (1), we get 9(y2−2) − y − 52 = 0⇒9y2 − 9y − 70 = 0⇒9y2 − 30y + 21y − 70 = 0⇒3y(3y − 10) + 7(3y − 10) = 0⇒(3y + 7)(3y − 10) = 0⇒3y + 7 = 0 or 3y − 10 = 0⇒y = −73 or y = 103When y = −73, thenx + 1x = −73⇒x2+1x = −73⇒3x2 + 7x + 3 = 0We have, a = 3; b = 7; c = 3Now, D = b2 − 4ac = 49 − 36 = 13>0So, x = −b±√D2a = −7±√136When y = 103, thenx2+1x = 103⇒3x2 − 10x + 3 = 0⇒3x2 − 9x − x + 3 = 0⇒3x(x − 3) − 1(x − 3) = 0⇒(3x − 1)(x − 3) = 0⇒3x−1 = 0 or x − 3 =0⇒x = 13 or x = 3
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Answer:
Roots are 3 and 1/3
or
Step-by-step explanation:
Explanation is in the picture
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