exam Maths Puzzle Numerical Ability

Can anyone help me on this problem?
solve x^2+7x-1=0

Finf the x-intercepts of:
f(x)=x^2+7x-1

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exam Other Question

Find the square of (w - 1/4)^2

Thanks for the help you can provide so I can understand this problem.
6x+4(3x-2)=6x+2