What is factor a^2-21a+20 ?

The solution to factor a^2-21a+20 is (a-1)(a-20)

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factor a^2-21a+20

factor

a^{2} - 21 a + 20

(a - 1) (a - 20)

Solution steps

a^{2} - 21 a + 20

Break the expression into groups

= (a^{2} - a) + (- 20 a + 20)

Factor out

a

from

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

Factor out

- 20

from

- 20 a + 20 : - 20 (a - 1)

= a (a - 1) - 20 (a - 1)

Factor out common term

a - 1

= (a - 1) (a - 20)

160 x - 16 x^{2} = 0

\frac{2}{7} = \frac{8 x}{7} + \frac{6}{7}

\frac{3 n ^{2} + 2 n ^{2}}{10 n}

(x - 14)^{2} = 2

\frac{7}{4} \cdot 6