Question

Find the decimal fraction which when multiplied by itself gives 84.64

Answer 1

it means square root of 84.64 wgich gives 9.2 as answer

Answer 2

Answer:

The numbers are 9.2 and -9.2

Step-by-step explanation:

Let the number is x.

when x is multiplied by itself we get $x\times x=x^2$

Now, from the given instruction, it is equal to 84.64. Thus, we have

$x^2=84.64\\x=\pm \sqrt{84.64}\\x=\pm \sqrt{\frac{8464}{100}}\\\\x=\pm \frac{92}{10}\\\\x=\frac{46}{5}=\pm9.2$

Therefore, the numbers are 9.2 and -9.2