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Using the "complete the square" method, solve the following x^2 +4x - 21 =0

x 2 +4x-21= 0, This can be factorised into brackets as shown: (x+2) 2 - 4 - 21 = 0 SImplified, so all x's are on one side of the equation: (x+2) 2 = 25, Removing square root, DONT FORGET "±" : (x+2...
CS
Answered by Charlotte S. • Maths tutor
6878 Views

Explain the difference between qualitative and quantitative data.

Qualitative data revolves around the quality , where subjective information and opinions are collected. For example, the user's thought about color, texture and comfort. Quantitive data is mainly numerical d...
KM
6849 Views

How do I conjugate 'aller' in the pluperfect tense?

Take the infitive form 'aller', remove the -er ending and add the perfect ending -é. Between the participle (allé) and the subject pronoun (je, tu, il etc.), add the auxilliary verb, in this case 'être' in t...
DT
Answered by Dylan T. • French tutor
8524 Views

Explain the term span of control.

Span of control refers to the number of subordinates reporting directly to a manager. There are two classifications which are wide span of control and narrow span of control. Wide span has many subordinates ...
AA
5707 Views

Given a circle with the equation y^2 + x^2 = 10, with a tangent that intersects at point P, where x=1, find the coordinates for the point at which the tangent meets the x axis (Q).

As the tangent meets the circle at P, when x =1, we can assume that the y value will be the same for this value of x. therefore we substitute x=1 into the equation of the cirlce. Rearranging the equation of ...
JP
Answered by Joseph P. • Maths tutor
5861 Views