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# Factoring polynomials

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9x4 + 4x3 - 27x2 + 12x <------ Factor by finding the GCF

x2 + 2x - 15 <--------Factor by grouping

For these problems, identify which of the methods from this lesson (GCF, grouping, difference of squares, or perfect squares) could be used to factor the polynomial.

17. x2 + 2x + 1

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

19. x2 - 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.
F This polynomial cannot be factored by any of the methods used in this lesson.