book Maths Puzzle Numerical Ability

i need help solving the following;
2x^ + 4x -3 = 0
could you show the working out and explain how to solve these problems, can you please help!
Thank you!

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book Other Question

Simplify: (-3a^2b^-2)^2 / (5a^3)^2

Thanks guys for your help, this is a huge help Find the equation of the verticle line that contains the point (4,-5). Express answer in general form or slope-intercept form.