What is factor z^2-9z+20 ?

The solution to factor z^2-9z+20 is (z-4)(z-5)

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factor z^2-9z+20

factor

z^{2} - 9 z + 20

(z - 4) (z - 5)

Solution steps

z^{2} - 9 z + 20

Break the expression into groups

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

Factor out

z

from

z^{2} - 4 z : z (z - 4)

Factor out

- 5

from

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

= z (z - 4) - 5 (z - 4)

Factor out common term

z - 4

= (z - 4) (z - 5)

2 > - 2

x^{3} - 4 x^{2} < 0

∣ v ∣ = 0

x^{2} + 3 x + 2 = 0

x^{2} + x - 10 = 0