exam
Maths Puzzle
Numerical Ability
find each product
(x-y)(x²-xy+y²)
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exam Other Question
A professor grades homeowrk by randomly checking 7 of the 20 problems assigned. in how many different ways can this be done?
3, 2, 5, 8
1,-2,1, -2
1,1,-1, 6
Use matrix
3x+2y+5z=8
x-2y+z=-2
x+y-z=6