exam Maths Puzzle Numerical Ability

24. Find b^2 � 4ac and the number of real solutions for the given equation.
�x^2 + 12x � 32 = 0

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exam Other Question

How would i factor this polynomial x^2-9 Solve the following system of linear inequalities by graphing
x-2y=>4
x<=4

I am getting really confused about where to shade, can anyone help me?

Thanks