exam Maths Puzzle Numerical Ability

(-3) 3pie - (-8)(-2)

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exam Other Question

2^2x - 12(2^x) + 32 = 0

I know the answers are 2 and 3 but I do not know how to prove it algebraically
Hi. Can I have some help with this problem?

Indicate which points are on the graph of the equation. (Select all that apply.)
y = -2x + 3

(0, 3)
(-1/2, 4)
(-1/2, -2)
(