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Question
Verify the following: 18 × [9 + (−7)] = 18 × 9 + 18 × (−7)
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Solution
L.H.S.
=18 × [9 + (–7)]
= 18 × [9 – 7]
= 18 × 2
= 36
R.H.S.
=18 × 9 + 18 × (–7)
= 162 – (18 × 7)
= 162 – 126
= 36
∴ L.H.S = R.H.S
Hence, verified.
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