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x2 = 49what's the answer

User Treddy
by
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1 Answer

4 votes

Solve the equation:


x^2=49

The simplest method to solve the equation is to apply the square root on both sides of the equation:


√(x^2)=√(49)

Since the square and the square root are inverse functions, they cancel out, leaving us with the equation:


x=√(49)

We must find a number such that its square results in 49. That number is 7. But we must recall that there is another number that produces 49 when squared. That number is -7.

This gives us two solutions. It can be written:


x=\pm7

The equation has two solutions:

x = 7, x = -7

User RobinHood
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