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KiRa [710]
3 years ago
15

What value of k makes the trinomial x^2- 10x + k a perfect square?

Mathematics
1 answer:
Advocard [28]3 years ago
3 0

Answer: 25

Step-by-step explanation:     (x-a)² = x² - 2ax + a²

  From x² - 10x + k  we deduce that 10x = 2·5x  and a = 5

Then k = 5²2

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