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Maths Puzzle
Numerical Ability
Solve by using Quadratic Formula
12x^2-10x-3=0
5x^2+4x-5=0
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please help me with this problem..
solve using the quadratic formula.
9d^2-81=0
Use the difference-of-squares patterns to factor f the following.
(x+6)^2-(x+9)^2