book
Maths Puzzle
Numerical Ability
ac-1 - a-1c
(A times C to the negative one MINUS A to the negative one times C)
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book Other Question
(x^2+x-20) (x^2+10+25)
_________ divide __________
(x^2-7x+12) ( x^2-6x+9)
4(11+7)-9x8=
i need help and can you explain it to me
thank you