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3x + y = -4; 3x -4y = 6; Solve the simultaneous equations for x and y

x = -2/3y = -2

JB
Answered by Jack B. • Maths tutor
3683 Views

Solve 6x – 5 = 2x + 13


6x - 5 = 2x + 13 (+5) -> 6x - 5 + 5 = 2x + 13 +5 ------> 6x = 2x + 18 (-2x) -> 6x - 2x = 2x - 2x + 18 ----------> 4x = 18 (divide 4) ->

Answered by • Maths tutor
5298 Views

A cubic polynomial has the form p(z)=z^3+bz^2+cz+d, z is Complex and b, c, d are Real. Given that a solution of p(z)=0 is z1=3-2i and that p(-2)=0, find the values of b, c and d.

I will explain this choice of question and demonstrate my approach of showing the most forward way to solve this in the interview.

Answered by • Maths tutor
3459 Views

Jill and four friends go camping together for 5 days. The friends share the cost of the trip equally. These costs are: £120 for fuel, £58 for food, £100 for equipment and £207 for activities. How much does Jill have to pay for her share of the costs?

The first thing we need to realise that the cost of the trip is going to be split between 5 people (Jill + 4 friends). As they are all sharing the cost of the trip equally, we need to find the total cost ...

LD
Answered by Lauren D. • Maths tutor
2734 Views

how do I solve the equation x^2 + 7x + 11 = 0, to 3dp?


This is a quadratic equation and there are three ways to solve one. This question specifies that the answer should be left to three decimal places. This tells you that you can not factorise, as your...

JD
Answered by Jamie D. • Maths tutor
4317 Views

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