What is factor z^2-18z-40 ?

The solution to factor z^2-18z-40 is (z+2)(z-20)

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factor z^2-18z-40

factor

z^{2} - 18 z - 40

(z + 2) (z - 20)

Solution steps

z^{2} - 18 z - 40

Break the expression into groups

= (z^{2} + 2 z) + (- 20 z - 40)

Factor out

z

from

z^{2} + 2 z : z (z + 2)

Factor out

- 20

from

- 20 z - 40 : - 20 (z + 2)

= z (z + 2) - 20 (z + 2)

Factor out common term

z + 2

= (z + 2) (z - 20)

192 w^{2} - 147

- 3 ∣ 5 x + 7 ∣ + 1 = - 5

6 x^{2} - 4 = 98

4 (x - 12) \frac{1}{3} = - 16

\frac{2 x}{3} = 4