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Solve the following simultaneous equations: 4x + y = 14 and 6x - y = 16

First, write out the equations beneath each other:

4x + y = 14

6x - y = 16

Then, label the equations a and b (let's take the top one as a, and the bottom one as b)

Answered by Rebecca S. • Maths tutor

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How to determine the number of unique real roots of a quadratic equation.

Take any quadratic equation, eg/ 3x²+4x-2=5, and rearrange to equal 0, ie/ 3x²+4x-7=0 ...

Answered by Yaniv P. • Maths tutor

22047 Views

What is Pythagoras's theorem?

For any right-angled triangle, the square of the hypotenuse (the side opposite the right angle) is the sum of the square of the remaining two sides.

Answered by Bhavika M. • Maths tutor

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How do I add two fractions? (plus example)

Adding (and subtracting) fractions is more difficult than multiplying them because we need to make sure that the denominators (bottom numbers) are equal in both fractions.

To do this, we may n...

Answered by Jenny B. • Maths tutor

4916 Views

How do I expand (x+a)(x+b)? (plus example)

The key to understanding expanding brackets is to understand that we need to multipy EVERYTHING in the first bracket by EVERYTHING in the second bracket.

We can think of the calculation

Answered by Jenny B. • Maths tutor

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