# 1{The physical exercise that is compulsory in Secondary Education during school hours is insufficient and many people stop doing

###### Question:

## Answers

all three statements are correct.

Explanation:

In secondary education, there is very less time for physical exercise so the students stop doing the physical exercise in the end. Asia is the largest continent having big area and highest population which is about 4.463 billions. Michelangelo Buonarrotiwas an Italian painter was born in the period of Renaissance on March 6, 1475 in Caprese Michelangelo, Italy while died on February 18, 1564, in the age of 89 at Rome, Italy.

answer

[tex]x = \pm 2\sqrt{2} \: \: or \: \: x = \pm 1[/tex]

explanation

the given equation is

[tex]{x}^{4} - 9 {x}^{2} + 8 = 0[/tex]

we can rewrite this as:

[tex]({x}^{2})^{2} - 9 {x}^{2} + 8 = 0[/tex]

let

[tex]u = {x}^{2}[/tex]

then the equation becomes:

[tex]{u}^{2} - 9 {u}^{2} + 8 = 0[/tex]

the factors of 8 that sum up to -9 are {-1,-8}

we split the middle term with these factors to obtain,

[tex]{u}^{2} - u - 8u+ 8 = 0[/tex]

we factor by grouping to obtain:

[tex]u(u - 1) - 8(u - 1) = 0[/tex]

[tex](u - 8)(u - 1) = 0[/tex]

apply the zero product property to get:

[tex]u - 8 = 0 \: \: or \: \: u - 1 = 0[/tex]

[tex]u = 8 \: or \: u = 1[/tex]

but

[tex]u = {x}^{2}[/tex]

[tex]{x}^{2} = 8 \: or \: {x}^{2} = 1[/tex]

[tex]x = \pm \sqrt{8} \: \: or \: \: x = \pm \: \sqrt{ 1}[/tex]

[tex]x = \pm 2\sqrt{2} \: \: or \: \: x = \pm 1[/tex]

i also think he is correct. i believe they came to washington to protest their rights.