is 9x^2 + 4 prime factor
Factor: 9x2 - 25.
(3x + 4)(3x - 4)
9x2 + 12x + 4 = 9x2 + 6x + 6x + 4 = 3x(3x + 2) + 2(3x + 2) = (3x + 2)(3x + 2) = (3x + 2)2
3x + 1)(3x - 4)
(3x + 4)(3x + 4)
what is the prime factor of 4
Yes.
No on both counts. 4 is not prime and 4 is not a factor of 30.
No. While 4 is a factor of 40, it is not a prime number.
While it is possible to factor 3x2 from both of these and get 3x2(4 - 1), it's a lot easier to subtract 3x2 from 12x2 and get 9x2
The GCF is 9.
If the question could more exactly be phrased as, "What is the value of x when 9x2 - 16 = 0", the answer is, x = 4 or -4. This answer can be found by factoring 9x2 - 16 into (3x + 4)(3x - 4) and setting each factor equal to zero.