exam Maths Puzzle Numerical Ability

use quadratic formula to solve equation

0=x^2+x-20

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exam Other Question

Solve s^2 = 9/4 5-3 on the outside of an absolute value bars with this euation inside the bars
-8-6. Looks like this 5-3|-8-6| I tried to do the inside firstand got -14 but when I got the outsid