What is factor 4s^2-21s+5 ?

The solution to factor 4s^2-21s+5 is (4s-1)(s-5)

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factor 4s^2-21s+5

factor

4 s^{2} - 21 s + 5

(4 s - 1) (s - 5)

Solution steps

4 s^{2} - 21 s + 5

Break the expression into groups

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

Factor out

s

from

4 s^{2} - s : s (4 s - 1)

Factor out

- 5

from

- 20 s + 5 : - 5 (4 s - 1)

= s (4 s - 1) - 5 (4 s - 1)

Factor out common term

4 s - 1

= (4 s - 1) (s - 5)

2 x^{2} + 9 x + 5 = 0

f^{- 1} (x)

\frac{x}{5} + x = \frac{9}{10}

7 x^{2} = 28 x

- 5 m < 20 and 6 m > - 18