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Answer:
1. (x+5)(x-1)
6. (3x+4)(x-6)
9. (x+5)(x-5)
Step-by-step explanation:
To factor an equation, break the polynomial into two binomials which multiply to make it. There are three main ways to factor:
Regular: Find two numbers that multiply to C and add to B from
.

Grouping: Find two numbers that multiply to A*C and add to B. Then split B into the two factors and factor by GCF.

Difference of Squares: Factor by taking the square root of each term. 

Answer: C
Step-by-step explanation:
The GCF of 2 and 4 is 2, so, divide both numbers in the ratio to find the simplified version.
2 to 4
2/2 to 4/2
1 to 2
Therefore, the answer is 1 to 2.
Best of Luck!