exam Maths Puzzle Numerical Ability

write a quadratic equation that has the solutions -10i and 10i
thank you

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exam Other Question

1)if x is increased by 25% then by what percent is x^2 increased??
2) A checker is placed on a rectangular table 3inches from one side of the table and 4inches from the adjacent s Edwin
my appologies I made a mistake
P = 4I - 100 (not plus as I put in the question)
sorry