Which expression is prime? A) x2 - 6x + 9 B) x2 + 16x + 64 C) 4x2 + 20x + 25 D) 9x2 - 30x - 25

2 answers:

4 0

D is a prime polynomial.

The best way to figure this out is by attempting to factor them all. Each of them factors into perfect squares except for D.

A)
x^2 - 6x + 9 = (x - 3)^2

B)
x^2 + 16x + 64 = (x + 8)^2

C)
4x^2 + 20x + 25 = (2x + 5)^2

D we can also tell won't have a perfect square like that because it ends in a negative number. No number multiplied by itself is negative.

adoni [48]3 years ago

4 0

Answer:

The answer is $9x^{2} - 30x - 25$ .

Step-by-step explanation:

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