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Factorise x^2 + 3x +2

You want two numbers that multiply to give 2 and add to give 3. Looking at factors is always easiest, so start by listing pairs of numbers that multiply together to give 2. There are only two such pairs, 1x2...
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Answered by Chloe H. • Maths tutor
6316 Views

8x – 7 > 6x + 12

Do not be daunted by the greater than sign. Just think of it like an equals sign. Remember, the key is to get the 'x' on its own. Collect the like terms as you normally would. As per convention, start with t...
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Answered by Ashley H. • Maths tutor
7322 Views

Simplify and solve the following equation: x^2 -8x +15=0

Simplify the equation first by putting the x^2 into brackets. I do this by finding two values that both multiply to get 15 and add to get -8. I can see that -3 and -5 fit this criteria, but i could easily go...
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Answered by Amira B. • Maths tutor
4973 Views

There are "n" sweets in a bag, six are orange and the rest are yellow. If you take a random sweet from the bag and eat it. Then take at random another one and eat it. The probability of eating two orange sweets is 1/3. Show that n²-n-90=0.

We have: n= total of sweets 6= orange sweets (6-n)=yellow sweets (We use 6-n beacuse we know that if 6 sweets are orange, the rest must be yellow, so yellow sweets= (total of sweets-orange sweets)) If the pr...
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Answered by Raquel L. • Maths tutor
5919 Views

The perimeter of a square is sqrt(120) cm, what is the area?

A square is a shape with 4 equal lengthed sides. The perimeter is the sum of the lengths of the sides. Therefore for a square, the length of one side is a quarter of the perimeter. In this example the perime...
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Answered by Harry M. • Maths tutor
17649 Views