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Maths
GCSE

(8/125)^(-2/3)

Denominator of the power expression indicates the degree of the root in this case its the cubic root. Numeriator denotes the degree of power in this case squared. The negative sign means to inverse the ba...

Answered by Andrew D. • Maths tutor
7719 Views

Solve (3x +1)/x + (2x-1)/3 = -3, giving x to two decimal places.

(3x+1)/x +(2x-1)/3 = (2x2 + 8x + 3)/3x by cross multiplying.

So equation becomes 2x2+ 8x + 3 = -9x by multiplying both sides by 3x. Adding 9x to both sides gives 2x2

Answered by Jorge A. • Maths tutor
3591 Views

The normal price of the pair of shoes is £28. In a sale the price is reduced by 35%. What is the new price of the shoes?

If you take £28, what is 10% of 28? 2.8 So what is 30% of 28? You would do 2.8 x 3... which is? 8.4 And what is 5% of 28? You would half 2.8...so 1.4 Now add together 30% of 28 and 5% of 28... this gives ...

Answered by Seyta D. • Maths tutor
3500 Views

Solve x^2 = 4(x – 3)^2

To solve this equation we need to firast expand it. 

x2=4(x-3)2

To do this we first expand the brackets. Remeber anything squared means times i...

Answered by Annabel M. • Maths tutor
23739 Views

how do you factorise a quadratic where there is a number in front of the x squared?

All quadratic equations have the form ax2 + bx + c.

If you take the equation: 2x2 + 4x + 2

In this example a=2, b=3 and c=2

In order to factorise wha...

Answered by Sagar M. • Maths tutor
17238 Views

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