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mamaluj [8]
3 years ago
7

Factor x^2 - 4x + 5. Prime (x + 5)(x - 1) (X - 5)(x - 1) (x + 5)(x + 1)

Mathematics
1 answer:
lisov135 [29]3 years ago
3 0

Answer:

Uhh? You can't factor this!

Step-by-step explanation:

So.. we see that the last term, the constant, (the +5) is positive, which means the two terms (the a and b on the (x+a)(x+b) must be either both positive or both negative).

We try positive, and we end up with

(x+1)(x+5)

x^2 + x + 5x + 5

x^2 + 6x + 5

which is not what we want!

We try negative, and we end up with

(x-1)(x-5)

x^2 -x -5x +5

x^2 -6x +5

which is also not what we want!

This isn't factorable!

You can always complete the square or utilize the quadratic equation, but you can't factor it.

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