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What is the coefficient of x^2 in the expansion of (5+2x)^0.5?

We the answer in question in the form A(1+B) 0.5 and we can do that by factorising out the 5. This gives 5 0.5 (1+0.4x) 0.5 . 2. Identify the formula we are going to use and put in the numbers from this equa...
AA
Answered by Akinmi A. • Maths tutor
4442 Views

Differentiate y=x^(-1/2)-x

The formula you are given is an equation which is written in terms of x. So we will be differentiating with respect to x. When differentiating we take the current power and place that in front of the term. T...
ZT
Answered by Zarin T. • Maths tutor
4286 Views

Find x when 2x-3=5

To find what x is, we must rearrange the equation so that it says x=. To do this we need to get rid of the -3 on the left hand side of the equation. This can be done by adding 3 to both sides of the equation...
RC
Answered by Rosie C. • Maths tutor
5390 Views

Solve the simultaneous equations y=x-5 and 10y=2x+6 by elimination, and by substitution.

Elimination: Multiply equation (eqn) 1 by 2 : 2y=2x-10 Subtract modified eqn 1 from 2 : 8y=16 Divide through by 8 : y=2 Sub y=2 into eqn 1 or 2 and rearrange to find : x=7 Subsitution: Sub eqn 1 into eqn 2 :...
JR
Answered by Jack R. • Maths tutor
4165 Views

what does a value shared in the ratio 2:3 mean?

this means that there are 5 parts to share out altogether. (2+3=5) So you take the value you wish to share and divide it by 5. once you've divided the value by five, to share in the ratio 2:3 simply means to...
ET
Answered by Ewan-James T. • Maths tutor
72741 Views