exam Maths Puzzle Numerical Ability

i AM HAVING PROBLEMS WITH THIS
Simplify
sqaure root7(9sqaure root2-3sqaure root7)

Thank you

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exam Other Question

Hi I need help with this

indicate which quadrant or coordinate axis contains the point.
(a)(3,-5)
(b)(-2,7)
(c)(0,-3)
(d)(-1,-2)
(e)(3,0)
(f)(6,4) write the point slope form of the equation of the line that passes through the point and has the given slope, then rewrite the equation in slope-intercept form

(-2, 4), m = 3

Thanks for help