What is factor 2a^2-a-1 ?

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

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factor 2a^2-a-1

factor

2 a^{2} - a - 1

(2 a + 1) (a - 1)

Solution steps

2 a^{2} - a - 1

Break the expression into groups

= (2 a^{2} + a) + (- 2 a - 1)

Factor out

a

from

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

Factor out

- 1

from

- 2 a - 1 : - (2 a + 1)

= a (2 a + 1) - (2 a + 1)

Factor out common term

(2 a + 1) : (2 a + 1) (a - 1)

= (2 a + 1) (a - 1)

6 u^{2} - 30 u = 0

x^{2} - 15 = 34

5 v = v + 32

x^{2} - 7 x - 10 = 0

- 3 (x - 2) > 2 x - 4