exam Maths Puzzle Numerical Ability

Use the quadratic formula:

2x^2-5x=3

Can anyone possibly help me understand this and how to write the answer in the correct terms. Thank you so much !

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exam Other Question

Can you help me please

Find all three zeros of f(x)=x^3-4X^2+13x+50 given that 3+4i is a zero

thank you
which of this is a function
x=y^2-4 and x^2+7=y