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Prove that the sqrt(2) is irrational

To do this we will assume sqrt(2) is rational , a fraction, which means: 2 1/2 = m/n ; m,n belong to integers. Also, m/n is an irreductible fraction , meaning m and n have no common divisors. 2 1/2 = m/n &lt...
JC
Answered by Joao C. • Maths tutor
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Expand and simplify 2(a + 3) + 5(a – 1)

Firstly we will start by expanding the brackets. We will do 2 a + 2 3 for the first bracket, then we will do 5 a + 5 (-1) for the second bracket which will give us 2a + 6 + 5a - 5. We will then simplify what...
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Answered by Serena B. • Maths tutor
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Factorise and solve x^2 - 8x + 15 = 0

In order to solve a quadratic equation by factorisation you must first find the two numbers which add up to - 8 and multiply to get 15. We can do this by trial and error - first listing all of the pairs of f...
LM
Answered by Lucy M. • Maths tutor
5775 Views

State what is meant by 'active transport' and explain how a plant root hair cell use this to facilitate nutrient uptake from the soil.

(I have underlined any keywords in this response) Break this question down into 2 halves to make it easier to answer: "What is meant by 'active transport' " : Active transport is the movement of mo...
CM
Answered by Cemal M. • Biology tutor
15807 Views

What is the difference between passé composé and imparfait?

Both of these tenses are used to denote events that occured in the past, but they are troublesome for several reasons and used in broadly different contexts. First, it is important to note that the imperfect...
MA
Answered by Manon A. • French tutor
3788 Views