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Solve the following simultaneous equation: 1) 2x=y-5, 2) 2y^2=4x^2+4x-15

The most instinctual method one would go by is to rearrange the terms so that one side of the equation will be equal to either x,y, or zero. In this case to avoid fractions it may be best to rearrange the...

Answered by King-Ting L. • Maths tutor

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How do you factorise a quadratic?

A quadratic equation is something that looks like this: ax²+bx+c. FACTORISING a quadratic means to put this equation in the form (dx+e)(fx+g). For example, take the equation x²+5x+6....

Answered by Ethan B. • Maths tutor

3211 Views

Solve x^3 - 25 = 103 - x^3

First, bring -25 to the other side: +25 which gives

x³ = 128 - x³

Now, same with - x³ ( + x³ for both sides), giving

2x³ = 128

Answered by Franziska F. • Maths tutor

2922 Views

How do you use the quadratic formula?

So we use the quadratic formula to find out 2 values of x satisfies the quadratic equation we have been given. First we need to write the quadratic formular down, (x=-b.. etc). If you see, we need to plug...

Answered by Amy B. • Maths tutor

2972 Views

How do I tackle fractional powers?

The main thing to know when answering these sorts of questions is that the denominator of the fraction is the root you take of the given number. For example, 16^1/2 is the same as the sqaure roo...

Answered by Cameron S. • Maths tutor

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