How many solutions does the equation z2 = -25 have? If it has solutions, what are they?
Answer
There are no solutions, since any real number squared is positive.
How many solutions does the equation y2 – 3 = 13 have? If it has solutions, what are they?
There are two solutions: y = ±4.
How many solutions does the equation x2 = 0 have? If it has solutions, what are they?
There's just one solution: x = 0.
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