Question

find the value (40)2​

Answer 1

Answer:

80

Step-by-step explanation:

if there is no sign after bracket or before bracket it means multiplication

40 . 2

80

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Answer 2

Given,

5x=(50)

2

−(40)

2

or, 5x=(50+40)(50−40)

or, 5x=90×10

or, x=180.