Question

Which option is correct? Explain your working after choosing your answer

x^2 – 169

A. This polynomial could be factored by finding the GCF, then by grouping or using the perfect squares method.
B. This polynomial could be factored by using the difference of squares method or grouping.
C. This polynomial could be factored only by using the perfect squares method.
D. This polynomial could be factored by using grouping or the perfect squares methods.
E. This polynomial could be factored only by using the difference of squares method.
F. This polynomial cannot be factored by any of the methods used in this lesson.

Answer 1

C and E

Explanation:

You could write the square root sign and add 169 in it and your answers would be +13 or -13. Another way could be (x+13) (x-13)