Question

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

Answer 1

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

Explanation:

being that it is x squared not 2x

Answer 2

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=√(f(b)), x=-√(f(b))`, where
`f(b)` is the right part of the equation.

The equation
`x^(2) = 49` has two solutions
`x=√(49)=7, x=-√(49)=-7`