exam Maths Puzzle Numerical Ability

Use the quadratic formula:

2x^2 - 5x = 3

Can someone please explain this type of problem to me, thank you so much!

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exam Other Question

Hi,
I need help with this problem: {{{3x^3-4x=1}}. I'm unsure how to factor it because of the cube. I moved the one to the other side and tried to factor it, but found i couldnt b (sqrt of b)-4=-1. what does b =? Thank you again for any help you can provide me with.