Question

without actual multiplication solve square of 403​

Answer 1

Answer:

Use the formula (a+b)

2

=a

2

+2⋅a⋅b+b

2

where a=80 and b=3,

(80+3)

2

=80

2

+2⋅80⋅3+3

2

83

2

=6400+480+9

=6889

Step-by-step explanation:

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