First, we put hit and trial method to find out the one solution. So, if we put x=4 then the above expression will become zero. We can also write the above expression as

$(x-4) \times\left(x^{2}-7\right)=0$

We know the formula, $a^{2}-b^{2}=(a+b)(a-b)$ , make use of this, we get

$(x-4) \times(x-\sqrt{7}) \times(x+\sqrt{7})=0$

So, $x=4, \sqrt{7},-\sqrt{7}$

Hence, from the above expression, we have three values of x as x= 4, 2.64 and -2.64

8 0

3 years ago

4 divided by 5 equals 12 divided by how much

tigry1 [53]

Answer: imma say 1

Step-by-step explanation: sorry if wrong

3 0

3 years ago

What is the inequality shown here

IgorLugansk [536]

Answer:

$- 3 \leqslant x < 2$

I hope I helped you^_^

5 0

3 years ago