<span>well you know that f(-3) is 4... sorry... g(-3) is 4. </span>
4 = - f(3),
f(3) = -4 just bring the - to the other side... and again sorry for using f instead of g, but you get the points.
this says the function when x is 3 equals -4
<span>(3,-4)
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The square root of 80 can be broken up into the square root of 16 x square root of 5. We know that the square root of 16 is 4. So in the form (a sqrt b)