Question

16.
(2a + 3b) = 14 and (2a - 36) = 2, find the value of ab.
Hint: use a - b = (a + b)(a - b)]

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Answer 1

Answer:

a=8 & b=14/3

Step-by-step explanation:

Use elimination method:

2a+3b=14

2a-3b=2

________

4a=16

.: a=8

Substitute in (2a-3b=2) & on solving

2*8-3b=2

16-3b=2

14=3b

.: b=14/3

Then,

a*b=8*(14/3)

=112/3 or 37.33