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Circle the correct letter: The equation x^3 - 30x^2 + 108x - 104 = 0 has a) No real roots; b) Exactly one real root; c) Three distinct real roots; d) A repeated root.

Firstly, the polynomial is a cubic, and so we know what its graph looks like, hence it must have at least one real root, and a) is false. Computing a root would be time consuming, so instead we adopt a di...

VC
Answered by Valerio C. MAT tutor
3454 Views

What is the solution to the system of equations defined by (1) x+2y = 4 and (2) y+2x = 6?

We rearrange equation (1) to obtain an expression in terms of x. We then substitute this expression in place of x in equation (2), rearranging to find the numerical value of y. This value of y can then be...

JH
Answered by Jake H. Maths tutor
3147 Views

What is the value of the integral of e^x from x = 1 to x = 2?

As the derivative of e^x is e^x, so is the integral (plus some constant). As we wish to find the value of the integral from x = 1 to x = 2, we substitute x=2 into e^x, and from that we subtract e^x with x...

JH
Answered by Jake H. Maths tutor
3807 Views

What is the difference between a Magistrates Court and a Crown Court?

It is helpful to know here that both of these courts are for criminal purposes. A Magistrates court will typically be used for smaller crimes such as not paying your speeding fine or being caught with dru...

LO
Answered by Lily O. Law tutor
26317 Views

When do you use the present subjunctive in spanish?

The most important thing to remember is that the present subjunctive (and past) is a mood rather than a tense. It doesn't refer to the time at which an action takes place but instead is used in impersonal...

EW
Answered by Emma W. Spanish tutor
4827 Views

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