Question 390292
No figure is shown.
If the side of the lawn is x, and 2 is the width of the walkway:
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{{{x^2 = (x+4)^2 - x^2}}}
{{{x^2 = 8x + 16}}}
{{{x^2 - 8x - 16 = 0}}}
*[invoke solve_quadratic_equation 1,-8,-16]
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{{{x = 4 + sqrt(32)}}} Ignore the negative solution
x =~ 9.657 meters
x = 9.7 meters