What is factor a^2-a-20 ?

The solution to factor a^2-a-20 is (a+4)(a-5)

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factor a^2-a-20

factor

a^{2} - a - 20

(a + 4) (a - 5)

Solution steps

a^{2} - a - 20

Break the expression into groups

= (a^{2} + 4 a) + (- 5 a - 20)

Factor out

a

from

a^{2} + 4 a : a (a + 4)

Factor out

- 5

from

- 5 a - 20 : - 5 (a + 4)

= a (a + 4) - 5 (a + 4)

Factor out common term

a + 4

= (a + 4) (a - 5)

4 x^{2} - 3 = 11 x

\frac{6 x ^{3} y}{x ^{2}} \cdot \frac{3 x ^{2} y}{8 x ^{3}}

63 x^{2} - 129 x + 36

- 8 x + 4 > - 3 x - 31

2 x + 4 < 6 x + 1