Explain how you would solve this equation: x – 5 = 12 (Hint what do you need to do to both sides of the equation?)
2 answers:
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Your equation is
So, you're asking that the left hand side, squared, must be 7.
There are only two possibilities for a number to give 7 then squared: that number is even the square root of 7 or its opposite.
So, one solution is given by .
The other is given by .