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Simplify the equation 2x^3 . 3x^2

There are two parts to this expression, the coefficients and the powers of x, and they can be addressed separately.It's important to remember the rules of indices - a^m x aⁿ= a^m...

Answered by Tom L. • Maths tutor

8180 Views

How do i answer a problem solving question if I don't know where to start?

This is a very common question as many people tend to not know here to begin in regards to answering most problem solving questions generally. My advice would be to approach the question the way i would; ...

Answered by Elizabeth M. • Maths tutor

2874 Views

f(x) = (x + 1)^2 and g(x) = 2(x - 1) Show that gf(x) = 2x(x + 2)

For this question, as we are looking for gf(x) so we first need to plug in our formula for f(x) into the g(x) formula, giving us:
2((x+1)^2 - 1)
We can then expand our squared bracket to get:

Answered by Django M. • Maths tutor

3146 Views

y is inversely proportional to x. When y = 2, x = 3. Work out the value of y when x = 18.

We have that y is inversely proportional to x, which we write mathematically as y ∝ 1/x. We need to be able to solve this, so we re-write this expression as an equations, y = k/x, where ...

Answered by Lauren M. • Maths tutor

20862 Views

How do I solve the simultaneous equations 3x+2y=17, 4x-y=30?

Lets number the equations: 1) 3x + 2y = 17 2) 4x - y = 30If we double equation 2) we will get matching y coefficients so:8x - 2y = 60 if we rearrange this to be 8x-60 = 2y Then if we put these together: 3...

Answered by Vicki L. • Maths tutor

3931 Views