Question
Find the value of:
(80 - 20) × (80 + 20)
(80 - 20) × (80 + 20)
✓
Answer
(80 - 20) × (80 + 20)
= (1 - 1) × (1 + 1)
$\Big[\because\text{a}^{0}=1\Big]$
= 0 × 2 =0
= (1 - 1) × (1 + 1)
$\Big[\because\text{a}^{0}=1\Big]$
= 0 × 2 =0
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