A gardening club has 21 members, of which 13 are males and the rest are females. What is the ratio of females to all Club members.

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Ответ:

annaebrown9737

18.01.2022

Mathematics

$x _{1} = 0 \: \: \: \: \: \: x _{2} = 9$

Step-by-step explanation:

$( {x - 4})^{2} - (x - 4) - 2 0 = 0$

First expand the terms in the bracket

That's

${x}^{2} - 8x + 16 - x + 4 - 20 = 0 \\$

Group like terms and simplify

${x}^{2} - 8x - x + 16 + 4 - 20 = 0 \\ {x}^{2} - 9x + 0 = 0 \\ {x}^{2} - 9x = 0$

Using factorization method to solve the quadratic equation we have

First factorize x out

That's

x(x - 9) = 0

When the product of factors equals zero at least one factor is zero

We have

$x = 0 \\ \\ x - 9 = 0$

Solve the two equations

We have

$x = 0 \\ \\ x = 9$

The equation has two solutions

We have the final answer as

$x _{1} = 0 \: \: \: \: \: \: x _{2} = 9$

Hope this helps you

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