exam Maths Puzzle Numerical Ability

I would appreciate any help with this problem.

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

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exam Other Question

simplify: (q^9)^7/r^6 The maximum value of z = 20x + 8y subject to:

3x + y ≤ 24
6x + 4y ≤ 66
x ≥ 0, y ≥ 0

a. 220
b. 160
c. 172
d. 132