Question

ishaan and disha are solving the equation x^2 =121 in difrent ways as follows.....

ishaan
x^2=121
x^2=11×11
x × x=11×11
x=11

disha
x^2=121
x^2=(-11)×(-11)
x × x =(-11)×(-11)
x=(-11)

who have solved the equation correctly? give reason.

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Answer 1

Answer:

ishaan has solved in correct manner as square root of a positive number can not be negative