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Maths Puzzle
Numerical Ability
what is the least commen factor please hurry up
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The problem I'm having trouble with is
If x = –1 and y = 2, what is the value of the expression 2x3(thats cubed) – 3xy ?
I understand how to substiture the numbers in, but
I get this far and then stuck and not sure if its right.
Simply and write answer in positive exponents only
(x^2)^-3 (x^-2) divided by (x^2)^4
My answer
x^-1 times x^-