exam Maths Puzzle Numerical Ability

How many real roots and or imaginary roots does the following equation have:

x^2 - 625 = 0

Thanks

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exam Other Question
3x^2 + 2x = 7


x^2 + 8x+9=-7



Thank You:-) Car B and car B are traveling in the same direction. Car A is traveling at a constant velocity of 60 mph and car Bi straveling at a constant velocity of 75 mph.

If car A reache