exam Maths Puzzle Numerical Ability

Determine whether the following equations have a solution or not? Justify your answer.
2x2 + x - 1 = 0

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exam Other Question

Please give me some input on this one:

For each item below, explaing whether you think it is best described by a linear function or a non-linear function.

a. The time it tak Please help me find the Domain of this equation.

h(x)=x^3-4x+5

Thanks in advance