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Popular >

factor 21a-7a^2

Solution

factor

21 a - 7 a^{2}

Solution

7 a (3 - a)

Solution steps

21 a - 7 a^{2}

Apply exponent rule:

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

a^{2} = aa

= 21 a - 7 aa

Rewrite

21

as

7 \cdot 3

= 7 \cdot 3 a - 7 aa

Factor out common term

7 a

= 7 a (3 - a)

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Frequently Asked Questions (FAQ)

What is factor 21a-7a^2 ?
The solution to factor 21a-7a^2 is 7a(3-a)