What is the least common denominator of 7/9 and 1/12

1 answer:

8 0

You could find this by going and doing:
<span>9: 9,18,27,36,45,54,63,72...
12:12,24,36,48,60,72...
</span>36 is the first # that pops up so you could do 36 as a common denominator

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HELP PLZ

Alexxandr [17]

Answer:

$x=\frac{-7-\sqrt{17}}{2}\textrm{ or }x=\frac{-7+\sqrt{17}}{2}$

Step-by-step explanation:

Given:

The equation is given as:

$x^2=-7x-8$

Rearrange the above equation in standard quadratic equation of the form $ax^2+bx+c=0$

Adding $7x + 8$ on both sides, we get

$x^2+7x+8=0$

Here, $a=1,b=7,c=8$

Now, we solve this using quadratic formula,

$x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}\\x=\frac{-7\pm \sqrt{7^2-4(1)(8)}}{2(1)}\\x=\frac{-7\pm \sqrt{49-32}}{2}\\x=\frac{-7\pm \sqrt{17}}{2}\\\\\\\therefore x=\frac{-7-\sqrt{17}}{2}\textrm{ or }x=\frac{-7+\sqrt{17}}{2}$