What is factor z^2-8z-20 ?

The solution to factor z^2-8z-20 is (z+2)(z-10)

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factor z^2-8z-20

factor

z^{2} - 8 z - 20

(z + 2) (z - 10)

Solution steps

z^{2} - 8 z - 20

Break the expression into groups

= (z^{2} + 2 z) + (- 10 z - 20)

Factor out

z

from

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

Factor out

- 10

from

- 10 z - 20 : - 10 (z + 2)

= z (z + 2) - 10 (z + 2)

Factor out common term

z + 2

= (z + 2) (z - 10)

(- 3) - 1

3 (2 x - 4) + 6 x - 1

\frac{2 a ^{2} + ab - b ^{2}}{a + b}

\frac{x ^{4} - 9 x ^{2} + 3 + x}{x + 3}

(- 5 + 12 i)^{2}