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Why do we bother using surds?

Surds are exact - they can’t be rewritten as a decimal or fraction without introducing a rounding error. If we’re using numbers in a calculation, keeping them as exact as possible until we round to the requi...
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Answered by Alice D. • Maths tutor
5221 Views

What are the roots of (2x-5)(x-3) = 0

First off, roots means solve for x. 0 multiplied by any number equals 0, therefore, either one of the brackets must itself equal 0.We can solve this by firstly setting 2x-5 = 0, and solving for x. (+ 5) to b...
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Answered by Ankit G. • Maths tutor
5795 Views

How do I draw a stem and leaf diagram?

To begin a stem and leaf diagram you will need to first order the data given to you into the question. The data in your stem and leaf must be in ascending order and grouped into tens. Draw the table separati...
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Answered by Beth F. • Maths tutor
4204 Views

Make 'a' the subject of the formula: p = (3a + 5) / (4 - a)

Firstly, multiply the whole equation by (4 - a) to cancel out the denominator, so the equation becomes: p(4 - a) = (3a + 5). Then expand the brackets: 4p - ap = 3a +5. Then rearrange the equation to: 4p - 5 ...
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Answered by Grace R. • Maths tutor
5962 Views

Solve the equation x^3-5x^2+7x-3=0

First start by considering the x 0 coefficient which is -3. These include ±3 and ±1. Substituting x=1 into the polynomial produces an answer of 0 which shows that x=1 is a factor of the polynomial. Therefore...
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Answered by Annabelle L. • Maths tutor
9215 Views