book Maths Puzzle Numerical Ability

what are the x-intercepts of the equation y=2x^2+4x-3
please answer with square roots or fractions

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book Other Question

what are the other ways to find for the vertex Rearrange the following so that the letter becomes the subject

y = 4z √y+z/x; x =

Can you please show your working out, and thank you in advance