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WAEC Further Mathematics 2020 Paper

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Question : 5

Total: 39

If

{\begin{pmatrix} p+q & 1 \\ 0 & p-q \end{pmatrix}} = {\begin{pmatrix} 2 & 1 \\ 0 & 8 \end{pmatrix}}

Find the values of

p

q

p = 5, q = 3
p = 5, q = -3
p = -5, q = -3
p = -5, q = 3

Solution:

p + q = 2

p - q = 8

$\overline{\;\frac{2p}{2} = \;\frac{10}{2}}$

p = 5

from p + q = 2

5 + q = 2

q = 2 - 5

= -3

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