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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
8140 Views

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
7233 Views

y^2-64

So here its similar principle to the previous question but the only difference is that there are no singular y's.So essentially the question reads : y^2 + 0y - 64So in the same way we need factors of 64 that...
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Answered by Maariya A. • Maths tutor
3256 Views

x^2 + 6x + 8

Factorising Quadratics, double bracketsWe want two numbers that multiply to give 8 and add to give 6. Lets list the factors of 8: 1, 2, 4, 8From the list of of numbers above, which 2 can add to give +6?2 and...
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Answered by Maariya A. • Maths tutor
3325 Views

Solve the simultaneous equations : x^2 + y^2 = 13 and x = y - 5 .

Below is the solution to the aforementioned question. In order to solve a simultaneous equation, one has to write one of the unkown variables in terms of the other. In this case, x was already written in rel...
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Answered by Sebastian G. • Maths tutor
18605 Views