Factor as the product of two binomials x^2-3x+2

a. the residual plot for model 1 has a random pattern and is a good fit for the data.

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

hope this ! ^w^