book Maths Puzzle Numerical Ability

Classify the given number as real and rational, real and irrational, or complex.

(80) ^ 1/5

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book Other Question

Does this quadratic equation have a solution and how do I justify?
1. p2-4p+4=0, 2.m2+m+1=0, 3. 3z2+z-1=0 im graphing A linear equation that involves y = -x + 3 and y = x + 1 and i dont know how to graph it