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Expand (x+1)(x-4)

Using the "FOIL" Technique should help with the expansion, telling you what order to multiply things together. F stands for "firsts", so the first step is to multiply the first things ...

Answered by Emily G. • Maths tutor

4722 Views

How to differentiate y = xcos(x)

You would first of all establish which differentiation rule is required, for this question it would be useful to use the product rule splitting xcos(x) into x multiplied by cos(x). We can label u = x and ...

Answered by Sophie C. • Maths tutor

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There are 10 boys and 20 girls in a class. The class has a test. The mean mark for all the class is 60. The mean mark for the girls is 54. Work out the mean mark for the boys.

Question: There are 10 boys and 20 girls in a class. The class has a test. The mean mark for all the class is 60. The mean mark for the girls is 54. Work out the mean mark for the boys.Answer: total mar...

Answered by Sajid K. • Maths tutor

3989 Views

Solve the simultaneous equations.

x= 9/2y= -3/2

Answered by Shivam P. • Maths tutor

2722 Views

expand out the bracket (2m - 3)(m + 1).

claw technique: multiply each 'thing' in the first bracket with each 'thing' in the second bracket.2m² + 2m - 3m -3then collect the like terms2m² -1 -3

Answered by Abigail P. • Maths tutor

3639 Views