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How find the values of x when x^2+8x+16=0?

We can find the values of x for this equation in several ways, we can either use the quadratic formula, complete the square, or see if the equation will factorise. For x^2+8x+16, we will first see whether we...
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Answered by Edward S. • Maths tutor
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What is y' when y=3xsinx?

In order to differentiate something like y=3xsinx, you need to make use of the product rule. The product rule says that when you have an equation in the form y=f(x)g(x), you can find y' by using the formula ...
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Answered by Edward S. • Maths tutor
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If a spinner was spun 50 times and the probability to show the number 2 was 0.2, how many times would it show the number 2?

Start by using the probability equation,th e probability of an event = the number of ways the event can occur/the total number of possible outcomes From the question we know that; the probability of showing ...
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Answered by Alice L. • Maths tutor
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Find the Co-ordinates and nature of all stationary points on the curve y=x^3 - 27x, and attempt to sketch the curve

Firstly we need to find the stationary points, we know that when the first derivative of the curve is equal to 0, this means it is a stationary point as there is no effective gradient. The first derivative i...
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Answered by Ahmed K. • Maths tutor
6569 Views

Write 40 as product of prime factors

Prime numbers are those that only have two factors, the number itself and 1. The two factors cannot be the same. E.g. 2 is a prime number but 1 is not.A prime factor is when a prime number is a factor of ano...
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Answered by Maariya A. • Maths tutor
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