No its not true and im sorry if this is wrong
Answer:
I assume you mean x^2 - 14x + 48. To factor this you want to find a number that adds to -14 and multiplies to 48. That means it'll have to be two negative numbers.
-6*-8 = 48
-6 + (-8) = -14
Your factored expression is (x - 6)(x - 8)
