What is factor 5x^2-36x-81 ?

The solution to factor 5x^2-36x-81 is (5x+9)(x-9)

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factor 5x^2-36x-81

factor

5 x^{2} - 36 x - 81

(5 x + 9) (x - 9)

Solution steps

5 x^{2} - 36 x - 81

Break the expression into groups

= (5 x^{2} + 9 x) + (- 45 x - 81)

Factor out

x

from

5 x^{2} + 9 x : x (5 x + 9)

Factor out

- 9

from

- 45 x - 81 : - 9 (5 x + 9)

= x (5 x + 9) - 9 (5 x + 9)

Factor out common term

5 x + 9

= (5 x + 9) (x - 9)

\frac{x}{4} = \frac{7}{12}

\frac{1}{9 ^{- 2}}

28 x^{3} - 63 x

2.01 c - 6 = - 0.15 c + 6.96

x^{2} \leq 16