What is factor 4a^2-25a+21 ?

The solution to factor 4a^2-25a+21 is (a-1)(4a-21)

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factor 4a^2-25a+21

factor

4 a^{2} - 25 a + 21

(a - 1) (4 a - 21)

Solution steps

4 a^{2} - 25 a + 21

Break the expression into groups

= (4 a^{2} - 4 a) + (- 21 a + 21)

Factor out

4 a

from

4 a^{2} - 4 a : 4 a (a - 1)

Factor out

- 21

from

- 21 a + 21 : - 21 (a - 1)

= 4 a (a - 1) - 21 (a - 1)

Factor out common term

a - 1

= (a - 1) (4 a - 21)

40 \div 10

40 \div 20

\frac{5}{10}

(- 3 i) (7 i) (- i)

\frac{x ^{2}}{4} + \frac{y ^{2}}{9}