exam Maths Puzzle Numerical Ability

SQUARING AND SUBSTITUTION

4M+ 8SQUARE ROOT M -5=0

4M PLUS 8 SQUARE ROOT SIGN WITH M UNDER IT -5=0
solve






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exam Other Question
it says to rewrite the expressions with positive exponents

heres the problem

51) x to the -5 power How do you factor completely 8n^2-2?