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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 eq...
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Answered by King-Ting L. • Maths tutor
3942 Views

How do you factorise a quadratic?

A quadratic equation is something that looks like this: ax 2 +bx+c. FACTORISING a quadratic means to put this equation in the form (dx+e)(fx+g). For example, take the equation x 2 +5x+6. The factorised form ...
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Answered by Ethan B. • Maths tutor
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Solve x^3 - 25 = 103 - x^3

First, bring -25 to the other side: +25 which gives x 3 = 128 - x 3 Now, same with - x 3 ( + x 3 for both sides), giving 2x 3 = 128 128 / 2 gives the value of 64 for x 3 In order to find the value for x, now...
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Answered by Franziska F. • Maths tutor
3664 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 in...
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Answered by Amy B. • Maths tutor
3805 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 root of 16, whic...
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Answered by Cameron S. • Maths tutor
3861 Views