Question

Use (a-b)square= a square -2ab +b square to find the value of (9.8)square ​

Answer 1

Answer:

(9-8) sq = 9 sq - 2 × 9 × 8 + 8 sq

= 81 - 144 + 64

= 81 - 208

= 127

hope it helps

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Answer 2

1. First write 9.8square as [10-0.2]square
2. Use formula (a-b)square =a square +b square -2ab