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Academics – Mathematics : 2013/JUL/02

Question

Q2. (a) Calculate the values of the currents in an electrical network which satisfy EACH of the following equations: (10)

I₁+ I₂+ 3I₃ = 9.8

2I₁ + I₂ - 8I₃ = 0.5

I₂- I₁ + 3I₃ = 4.2

(b) Factorise EACH of the following:

(i) 2ax - 3ay + 4bx - 6by - 2cx + 3cy; (3)

(ii) 64a²x² - 100b²y². (3)

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