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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

3279 Views

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

3351 Views

Find the equation of the tangent to the curve y = 3x^2(x+2)^6 at the point (-1,3), in the form y = mx+c

Curve: y = 3x²(x+2)⁶Coordinate: (-1, 3)

This is typically a C3/4 level question because of the differentiation, but the rest of t...

Answered by BUNEME K. • Maths tutor

11695 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

3018 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

3040 Views