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Maths
GCSE

Solve the simultaneous equations 5x + y = 21 and x- 3y = 9

There are different ways to approach solving a simultaneous equation question. For this one I recommend using substitution for this one where you insert one equation into the other.
First take the eq...

Answered by George B. Maths tutor
2369 Views

Solve x^2+10x-3=0 by completing the square, simplify your answer.

x2+10x-3=0(x+5)2-(5)2-3=0 (half the 'x' coefficient and put it in the bracket with x to be squared, then take away that new number squared followed by the original constan...

Answered by Tutor575114 D. Maths tutor
2748 Views

How would you simplify this: ((4x+1)/4)+((1-3x)/3)

You must manipulate the fractions so that they both have the same denominator. To do this, multiply the first fraction by 3 and the second by 4 so that they both have the denominator 12. The problem can t...

Answered by Isobel H. Maths tutor
2192 Views

If the two shorter lengths of the triangle have sizes 4cm and 3cm, what is the length of the longest side?

5 cm

Answered by Diana S. Maths tutor
1903 Views

Solve: x^2 – x – 12 = 0

Method 1: Solve by inspection.
Demonstrate that quadratic equations can often be written in the form (x+a)(a+b) = 0. Explain that possible solutions arise as a result of either (x+a) or (x+b) =0. Not...

Answered by Nikesh A. Maths tutor
2352 Views

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