If a and b are zeroes of polynomial x^2 + 7x + 7 , find the value of a^-1 + b^-1 -2ab.
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Answered by
24
Answer:
-15
Step-by-step explanation:
a+b= -7
ab=7
a^-1 +b^-1 -2ab
= 1/a +1/b -2ab
=(b+a)/ab -2ab
=-7/7 - 2(7)
=-1 -14
=-15
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