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1iii) Solve 7/2x^2+13/4x+1=2

In order to solve this trickier problem, the quadratic equation must be applied 
x=[-b +- sqrt(b^2-4ac)]/2a

Apologies for messy notation, full solution will be demonstrated during inter...

KI
Answered by Kishwar I. Maths tutor
3587 Views

1ii) sketch y=x^2-4x-21

A parabola shape with x intercepts at x = -3 and x = 7 and the y intercept at y = -21

KI
Answered by Kishwar I. Maths tutor
3708 Views

1i) solve x^2-4x-21=0

Factorise to get (x+3)(x-7)=0 
So you can see that x = -3 or x =7 

KI
Answered by Kishwar I. Maths tutor
3921 Views

Describe the difference between the function of a receptor and the function of an effector. Give examples.

When seeing this sort of question, I would handle it by explaining what both a receptor and an effector is firstly and giving examples. Secondly, I would explicitly state the difference to make sure the a...

AM
Answered by Ashni M. Biology tutor
26665 Views

Why can endothermic reactions occur spontaneously if the entropy change is negative for a cooling process?

An endothermic process is one which cools as the reaction proceeds meaning that the entropy change of the reaction will be negative. These reactions may still be feasible as the spontaneous nature of a re...

ER
Answered by Eve R. Chemistry tutor
16885 Views

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