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Maths
GCSE

Solve the simultaneous equations 2x + 7y = 15 and 3x + 6y = 21

Find the lowest common multiple of 2 and 3, which is 6. Multiply each term in the first equation by 3, and each term in the second equation by 2 to produce two equations with the same coefficient of x (wh...

Answered by Isobel R. Maths tutor
2899 Views

Fully factorise 2a^2b+6ab^2

1) Find the common factor between 2 and 6 (if there is one)... ...which is 2. 2) Find the common factor between a^2b and ab^2... ...which is ab. 3) Combine...

Answered by James H. Maths tutor
17151 Views

How do you complete the square?

You start off with a formula in the form y = x2 + bx. The first step is to add the square of half of the coefficient of x: (b/2)2. This allows us to rearrange the formula into (x+ b/...

Answered by Jamie M. Maths tutor
2456 Views

How can I factorise 2(x^2)+3x+1=0 ?

This quadratic equation is in the form ax^2+bx+c=0 (a=2, b=3, c=1), where there is a coefficient in front of X2 term. First we have to multiply a and c. we then have to find two numbers z and y...

Answered by Jonathan R. Maths tutor
2513 Views

How do I use the quadratic formula?

example quadratic eqn: ax2+bx+c=0 => x = (-b+-(b2-4ac)1/2)/2a <...

Answered by Ben B. Maths tutor
2516 Views

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