exam Maths Puzzle Numerical Ability

Please help with the following problem: e^x = 2^x+1

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exam Other Question

Can you please explain this to me?

Divide:
2x^2 + 5x - 12
_______________ divided 2x^2 - 7x + 6
9x^2 - 16 _____________
3x^2 - x -4

thank you
Julie x^2+(y+3)^≤4