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svlad2 [7]
3 years ago
8

The square of 9 less than a number is 3 less than the number. What is the number?

Mathematics
1 answer:
gavmur [86]3 years ago
3 0

Answer: D

Step-by-step explanation:

(x-9)² =  x-3

(x-9) (x-9)= x-3

x² - 9x-9x +81 = x-3

x² -18x+81 =x-3

x²-19x+84 =0

(x-12)(x-7)=0

x=12 or 7

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