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Factorise and solve x^2 - 8x + 15 = 0.

Whenever faced with a quadratic equation in the form of AX^2 + BX + C = 0, the first thing you do is factorise it, which will look something like this: (X )(X ) = 0.You can see from this that when you multip...
ZN
Answered by Zarmala N. • Maths tutor
3884 Views

Expand (x-5)(2x-3)

(x-5)(2x-3)= 2x 2 -3x-10x+15 = 2x 2 -13x + 15
SS
Answered by Sharone S. • Maths tutor
5645 Views

You are told that the y is proportional to x^2 and that when y=75, x=5. Find a formula for x in terms of y.

If we know that y is proportional to x 2 then we using the given values we can write 75= 5 2 --> 75=25, however this is obviously not true but all that remains is to multiply the 5 2 by 3 which gives us 7...
JP
Answered by Jenieka P. • Maths tutor
3640 Views

Solve 9x - 3 = 4x + 17

The objective of the question is to find an answer to x = ?, where ? is a number. Start by 'moving' all the x's to one side of the equals sign and all the numbers to the other. This can be done by adding / s...
MC
Answered by Michael C. • Maths tutor
5837 Views

Expand and simplify fully 4(x - 2) - 2(3 - 5x)

Firstly, expand out the first bracket - 4x - 8 - 2(3 - 5x) Then the second bracket (remember a minus x a minus = a positive) - 4x - 8 - 6 + 10x Then finally group the like terms together - 4x + 10x - 8 - 6 =...
CR
Answered by Calum R. • Maths tutor
6177 Views