exam Maths Puzzle Numerical Ability

Is it possible to have squares of any integer to be a negative one?
Say x^2= -1 or -4?

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exam Other Question

A baseball player's batting average is the ratio of the number of hits to the official number of times at bat. A player had 150 hits during a season and wound up with a batting ave Please help. -5(1-5x)+5(-8x-2)=-4x-8x Thank you.