Using identities, evaluate :
8.9²
Answers
Answered by
0
Answer:
Using the identity (a−b)
2
=a
2
+b
2
−2ab
8.9
2
=(9−0.1)
2
=9
2
+0.1
2
−2×9×0.1
=81+0.01−1.8
=79.21
Step-by-step explanation:
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Answered by
0
Answer:
Step-by-step explanation:8.9)²
= ( 9 - 0.1)²
= (9)² - 2(9)(0.1) + (0.1)²
= 81 - 1.8 + 0.01
= 81 - 1.79
= 79.21
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