What is factor 20a^2-7a-40 ?

The solution to factor 20a^2-7a-40 is (4a+5)(5a-8)

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factor 20a^2-7a-40

factor

20 a^{2} - 7 a - 40

(4 a + 5) (5 a - 8)

Solution steps

20 a^{2} - 7 a - 40

Break the expression into groups

= (20 a^{2} + 25 a) + (- 32 a - 40)

Factor out

5 a

from

20 a^{2} + 25 a : 5 a (4 a + 5)

Factor out

- 8

from

- 32 a - 40 : - 8 (4 a + 5)

= 5 a (4 a + 5) - 8 (4 a + 5)

Factor out common term

4 a + 5

= (4 a + 5) (5 a - 8)

2 m^{2} - 5 m - 3

∣ 2 x - 9 ∣ > 5

- 2 (- 4 x - 3) - 5 x + 3 = - 3

r^{2} - 12 r + 35

∣ x + 4 ∣ \leq ∣ 2 x - 6 ∣