exam Maths Puzzle Numerical Ability

Solve by completing the square.
4x^2 + 2x - 3 = 0

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exam Other Question

factor by using the perfect-square trinomial formula

y^2 - 12y +36
compute the amount and the compound interest:

A) P=$6000 T=4yrs. R= 8.5% figure semiannyally
B) P=$3500 T=2yrs. R= 4% figure quarterly