Factoring means using primes to get the answer (I think). So 5 is a prime; 2 is prime-like (sometimes it's a prime, sometimes it's not -- I think it's a prime); nine turns into two primes 3 and 3; and negative eighteen turns into -1, 2, 3, 3. (The digits are your answer).
5x2 + 3x - 1 does not have rational factors.
5x2 + 20x = 5x (x + 4)
5x2-46x+9 = (5x-1)(x-9)
5x2-18x+9 = (5x-3)(x-3)
x(5x - 4)
With great difficulty!
5x2
5x2 + x - 6 = (5x + 6)(x - 1) 5x2 - x - 6 = (5x - 6)(x + 1)
The GCF is 5x2
5x2
340 34x10 2x17 5x2
x(5x + 7)