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Write x^2 + 4x - 16 in the form (x+a)^2-b

Concentrate on the x^2+4x. Halve the 4 or any number that occupies that space. Equals 2 in this case. Put (x+2)^2 and that is your first term. Expand the brackets= x^2 + 4x + 4. Don't want the extra + 4 a...

Answered by Lucy B. • Maths tutor

8898 Views

a=7 and b=2, Work out the value of (a/b)-a^b

(7/2) - 7²(7/2) - (98/2)= -(91/2)

Answered by Lauren P. • Maths tutor

7900 Views

A curve has the equation y=3x^3 - 7x^2+52. Find the area under the curve between x=2 and the y-axis.

With a question like this. Firstly you have to read it, of course. But more importantly you have to understand what it is asking of you. So it is asking to find the area with boundaries at x=2 and the y a...

Answered by Calvin C. • Maths tutor

3174 Views

Here is a list of numbers: 15, 9, 12, 13, 6, 15, 18, 10, 11, 21. Find the mean, median and the mode.

To find the mean, we add all the numbers and divide by how many numbers there are. 15+9+12+13+6+15+18+10+11+21 = 130130/10 = 13The mean is 13.To find the median, we first arrange the numbers into order: ...

Answered by Danielle H. • Maths tutor

4285 Views

5y + 1 = 3y + 13

The first step is to reverse any addition or subtraction. Gather all terms being added on one side. Remember that crossing over from one side of the equal sign to the other negates the symbol before the n...

Answered by Princess C. • Maths tutor

3863 Views