Answer: -4(x+3)(x+4)
Step-by-step explanation:
first, you want to take out the GCF, which is -4
-4x^2 - 28 - 48
= -4(x^2+7x+12)
then you find two numbers whose product is 12, and whose sum is 7 (3 and 4)
so -4(x^2+7x+12) becomes -4(x+3)(x+4)
