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Show me why the product of a squared and a cubed is a to the power of 5.

When we find the product of two terms that has the same base (in this case, a), we can simply add the powers. This can be explained using knowledge of squares and cubed. a 2 = a x a and a 3 = a x a x a and s...
LM
Answered by Leon M. • Maths tutor
7953 Views

expand (x-3)^2

firstly explain (x-3) 2 = (x-3)(x-3) on the whiteboard I'd draw a square grid with each of the numbers, then I'd multiply out. E.g. x multiplied by x = x 2 ; x multiplied by -3 = -3x and so on.. (remembering...
IT
Answered by Imogen T. • Maths tutor
11502 Views

2x + 7y = 14 and x + y = 2. Find the value of x and y which satisfy both equations.

There are 2 ways to solve simultaneous equations which are by substitution or elimination. In this example you can use both but elimination is simpler. So we have 2x + 7y = 14 and x + y = 2. To use eliminati...
AS
Answered by Amir S. • Maths tutor
4939 Views

I have invested £10000 for 5 years and I how have £12763 in my account. What is my banks interest rate?

This question is an example of compound interest rates. The question asks to find the interest rate of the bank. So first of all we should form an equation relating our initial amount, interest rate, time an...
AS
Answered by Amir S. • Maths tutor
3657 Views

Solve these equations simultaneously, y= 5x - 9and, x=2y

X=2Y=1
CP
Answered by Charlie P. • Maths tutor
3319 Views