exam Maths Puzzle Numerical Ability

find the zeroes of the function algebracilly. use any method.
F(x)=2x to the 2 power +11x+3

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exam Other Question

thanks, can you please help me solve this

x + 5y = 10
-2x - 10y = -20 change to polar form & multiply or divide

-4i/sq. root 3 +i