Question

solves the equation x2=49 and found that x=7. What error did Suri make?

Answer 1

Answer:

when yoU TAKE THE SQUARE ROOT YOU GET BOTH THE POSITIVE AND NEGATIVE answers so the answers are 7 and -7

Step-by-step explanation:

being that it is x squared not 2x

Answer 2

Answer:

The error of Suri was not to notice that x could also be x = -7

Step-by-step explanation:

When you solve equations of this form $x^{2} =f(b)$, the solutions are:

$x=\sqrt{f(b)}, x=-\sqrt{f(b)}$, where $f(b)$ is the right part of the equation.

The equation $x^{2} = 49$ has two solutions $x=\sqrt{49}=7, x=-\sqrt{49}=-7$