exam
Maths Puzzle
Numerical Ability
Factor the trinomial:
-3x^2+21-30
Factor out any common monomials first (including -1 if necessary).
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exam Other Question
simplify 6 square root 20 + square root 180 - 2 square root 45
If k(r)=7-4r, find k(1+h)-k(1)
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h