Evaluate using suitable identities
(22)^2
– (20)^2
Answers
Answered by
0
Answer:
(20 - 2)(20 + 2)
= (20)² - (2)²
= 400 - 4
= 396.
Step-by-step explanation:
Answered by
0
Answer:
84
Step-by-step explanation:
(22)² - (20)² { a² - b² = (a-b)(a+b) }
(22-20)(22+20)
2 × 42
84
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