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Mathematics

Answered

if f(x)=x²-18x+91, solve for x when f(x)=10

Answer :

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Answer:

x = 9

Step-by-step explanation:

x²-18x+91 = 10

x²-18x+81 = 0

(x-9)(x-9)= 0

x = 9

check:

9² - 18 (9) + 91

81-162+91 = 10

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