exam Maths Puzzle Numerical Ability

Find all real zeros of the function f(x)=x^4+x^2+12.
I know I`ve asked alot of questions lately, sorry dont hate me!

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exam Other Question

identify the exponential function of the form f(x)=a(2^x)+b whose graph is shown in figure.

info:

2 points on graph (0,-2), (2,1)
y=-3
WHAT IS THE ANSWER TO
Y(3Y-8)(5Y+3)=0