exam
Maths Puzzle
Numerical Ability
[ 2 1 ] + [ 6 -2 ] - [ 2 2]
-1 2 3 0 1 1
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exam Other Question
y=-(-4)+/-square root of -4^2-4(1)(1)divided by 2(1)
y equals the opposite of b +/- the square root of b^2 - 4ac over 2a
another problem; help please thanks
Find the difference: (1-9i)-(5-i^2-8i)