The problem
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"We need to factor out the GCF (Greatest Common Factor).
The resulting term is a product of the GCF and the original expression divided by the GCF.
In our example, the GCF is equal to -r_1+1."
y_0r_2(-r_1+1)+y_1(r_1-1) becomes
(-r_1+1)(y_0r_2-y_1)
Can someone explain this part? Thanks!
Answer provided by our tutors
Assuming you are reffering to the following step:
We are pulling (-r_1 + 1) in front of the brackets, so what is left after is:
