book Maths Puzzle Numerical Ability

z^4 -11z^2 +30=0

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book Other Question

I need to solve this one and I need help: I have to apply the quadratic formula to find the roots of the given function, and then graph the function.

g(x) = x^2 + x + 12 Find the vertex and intercepts for each quadratic function. Does it open up or down? y = x^2 � 4