book Maths Puzzle Numerical Ability

Find the real solution, if any. Use quadratic formula and calculator.
x^2+sqrt2x-2=0

Thanks Caroline

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book Other Question

how do u do this 2x+3y=(-4)
x+y=(-2)

and this x+2y=0
y=3 Identify the shape of the graph, transform it into standard form, and sketch the graph.
25x^2 + 4y^2 - 300x - 24y + 836 = 0