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4x^2 + 9 is a prime algebraic expression. Its numerical value may be prime of not - depending on the value of x.

For x = 1, the value of the expression is 13 - a prime whereas

for x = 2, the value of the expression is 25 - not a prime.

Q: Is 4x2 9 prime

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4x2 = 8, 8-9 = -1 therefore the answer is "-1"

4x2-36x+81 (2x-9)(2x-9)

No, it has factors... 4x2 + 8x -21 = (2x+7)(2x-3)

Not if x is an integer.

The expression is likely 4x2 - 36x +81 which is the same as (2x - 9)(2x - 9) or (2x - 9)2

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4x2 = 8, 8-9 = -1 therefore the answer is "-1"

4x2 - 36x + 81 = 4x2 - 18x - 18x +81 = 2x(2x - 9) - 9(2x - 9) = (2x - 9)2

4x2-36x+81 (2x-9)(2x-9)

No, it has factors... 4x2 + 8x -21 = (2x+7)(2x-3)

4x2 - 3x - 9

no it isn't because 4x2 =8.

NUMBERS! no 3 is prime, 7 also prime and 8 is 4x2

Not if x is an integer.

The expression is likely 4x2 - 36x +81 which is the same as (2x - 9)(2x - 9) or (2x - 9)2

first it is 80x7- 7 is prime then, ^ 8x10- then ^ ^ 4x2 and 5x2- 5,2,2 are prime...then, ^ 2x2 then your done !

Only if the value of c is 9 because:- 4x2+12x+9 = (2x+3)(2x+3)

2 is a prime number so it has no prime factorization 8 is 4X2 and 2X2 is 4 so the factorization of 8 is 2X2X2