Question

Can anyone explain...
How √2-8√2 = -7√2 ?
ONLY ANSWER IF YOU KNOW THE ANSWER OTHERWISE I WILL REPORT IT! ​

Answer 1

Answer:

It seems you think this is complicated. But it actually is very easy.

Step-by-step explanation:

In these type of questions, i will tell you a trick that i use to simplify it.

Mostly in questions, we do not have to find the value of $\sqrt{2}$ and then solve.

As $\sqrt{2}$ is an irrational number, we can take a common variable x in its place. So our equation forms as:

x-8x [Really simple now!]

=-7x or [Putting the value of x],

we can write it as -7$\sqrt{2}$

I wrote it long to ake you understand. If u understood, pls let me know.

Hope it helps!!

Answer 2

$\sqrt{2} - 8 \sqrt{2} = - 7 \sqrt{2} \\ \sqrt{2} + 7 \sqrt{2} = 8 \sqrt{2} \\ 8 \sqrt{2 } = 8 \sqrt{2}$