What is solvefor x,8<x(7-x) ?

The solution to solvefor x,8<x(7-x) is (-sqrt(17)+7)/2 <x<(sqrt(17)+7)/2

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

Solve for x 8<x(7-x)

solve for

x, 8 < x (7 - x)

\frac{- 17 + 7}{2} < x < \frac{17 + 7}{2}

Solution steps

8 < x (7 - x)

Switch sides

x (7 - x) > 8

Rewrite in standard form

7 x - x^{2} - 8 > 0

Complete the square

7 x - x^{2} - 8 : - (x - \frac{7}{2})^{2} + \frac{17}{4}

- (x - \frac{7}{2})^{2} + \frac{17}{4} > 0

Move

\frac{17}{4}

to the right side

- (x - \frac{7}{2})^{2} > - \frac{17}{4}

Multiply both sides by

- 1

(x - \frac{7}{2})^{2} < \frac{17}{4}

For

u^{n} < a

, if

n

is even then

- \frac{17}{4} < x - \frac{7}{2} < \frac{17}{4}

a < u < b

then

a < u and u < b

- \frac{17}{4} < x - \frac{7}{2} and x - \frac{7}{2} < \frac{17}{4}

- \frac{17}{4} < x - \frac{7}{2} : x > \frac{- 17 + 7}{2}

x - \frac{7}{2} < \frac{17}{4} : x < \frac{17 + 7}{2}

Combine the intervals

x > \frac{- 17 + 7}{2} and x < \frac{17 + 7}{2}

Merge Overlapping Intervals

\frac{- 17 + 7}{2} < x < \frac{17 + 7}{2}

Number Line

\frac{- 17 + 7}{2} < x < \frac{17 + 7}{2}

∣ - 5.8 ∣

x^{2} - 2 x - 10 = 0

c, - 32 c + 12 \leq - 66 c - 16

31%

x, 5^{x} = 50

What is solvefor x,8<x(7-x) ?
The solution to solvefor x,8<x(7-x) is (-sqrt(17)+7)/2 <x<(sqrt(17)+7)/2