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Popular >

factor 7r^8-21r^3

Solution

factor

7 r^{8} - 21 r^{3}

Solution

7 r^{3} (r^{5} - 3)

Solution steps

7 r^{8} - 21 r^{3}

Apply exponent rule:

a^{b + c} = a^{b} a^{c}

r^{8} = r^{5} r^{3}

= 7 r^{5} r^{3} - 21 r^{3}

Rewrite

21

as

7 \cdot 3

= 7 r^{5} r^{3} - 7 \cdot 3 r^{3}

Factor out common term

7 r^{3}

= 7 r^{3} (r^{5} - 3)

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Frequently Asked Questions (FAQ)

What is factor 7r^8-21r^3 ?
The solution to factor 7r^8-21r^3 is 7r^3(r^5-3)