(7.8)²-(2.2)² simplyfy
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Answered by
0
Answer:56
Step-by-step explanation:(7.8)²-(2.2)²
= (7.8-2.2)(7.8+2.2).
[Reason: (a)²-(b)²=(a-b)(a+b)
= (5.6)×(10)
= 56
Answered by
0
Answer:56
Step-by-step explanation:
(7.8)^2 -(2.2)^2
=(7.8+2.2) ×(7.8-2.2)
[since a^2 - b^2= (a+b)(a-b)]
=10×5.6
=56
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