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

An auto mechanic has total receipts of $1861.16 for a certain day. He determines that $$1240 of this is labor. The remaining amount is for parts plus 6% sales tax on the parts only. Find the amount of the sales tax he collected complete the square
x^2+2x=8

x= ? and ?