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Show that (x+1)(x+2)(x+3) can be written as ax^3+bx^2+cx+d

Start by multiplying any 2 brackets together: (x + 1)(x + 2): Split the 1st bracket: x(x+2) + 1(x+2) = x^2 + 2x + x + 2 = x^2 + 3x + 2 Then multiply that answer with the last bracket: (x + 3)(x^2 + 3x + 2): ...
RS
Answered by Rushab S. • Maths tutor
4323 Views

A solution to the equation 2x^2-3x-17=0 lies between 2&3 use method of trail and improvement to find the solution

Sub 2.5 into equation it returns 6.75 so x<2.5 sub 2.25 it returns -0.96875 so 2.25<x<2.5 sub 2.4 it returns 3.448 so 2.25<x<2.4 sub 2.3 it returns 0.434 so 2.25<x<2.3so to 1 dp x=2.3 wo...
DC
Answered by Daniel C. • Maths tutor
4179 Views

What are measures of central tendency and how do you work them out?

Measures of central tendency are averages of the data from an experiment. There are few different types: mean, median and mode. The mean is worked out by adding all the scores together and dividing that numb...
KP
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To what extent did the execution of Mary, Queen of Scots, have the greatest impact on relations between England and the Catholic powers in the period 1568-88?

Introduction:> State why the period in the question is significant> Acknowledge the debate: widely contested by historians - where does this question fit in with the wider debates which surround the wi...
CT
Answered by Carys T. • History tutor
3181 Views

Please solve (x+3)(x+4)=20 for x

Expand the double bracket (x+3)(x+4) first: 1) (x)(x)= x^2, 2) (x)(4)=4x ,3) (3)(x)=3x, 4) (3)(4)=12write expanded equation:x^2+4x+3x+12=20simplify and equate the right hand side to zero:x^2+7x-8=0solve for ...
CM
Answered by Caitilin M. • Maths tutor
3004 Views