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

x²+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,...

Answered by Charlotte S. • Maths tutor

5247 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.

Answered by Kathryn M. • Design & Technology tutor

5885 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' i...

Answered by Dylan T. • French tutor

6933 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 subordina...

Answered by Anuoluwapo A. • Business Studies tutor

3971 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 ...

Answered by Joseph P. • Maths tutor

4683 Views