To factor out the greatest common factor (GCF) from the polynomial x^8 + 5x^7, we need to find the common factors between the terms.
The GCF of x^8 and 5x^7 is x^7 because it is the highest power of x that divides evenly into both terms.
Factoring out x^7, we get:
x^7(x + 5)
Factor out the GCF from the polynomial.
x^8+5x^7
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