Question

find square of the following numbers containing 5 in the units digit
a. 35
b.75​

Answer 1

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Answer 2

Answer:

1225 And 5625

Step-by-step explanation:

A. (30 ^2 + 5 ^2 )= 2 X ( 30 X 5 ) + 30 X 30 + 5 x 5

= 900 + 25 + 300

= 1225

B. ( 70 ^ 2 + 5 ^ 2 ) = 70 X 70 +5

X 5 + 2 X 70 X 5

= 4900 + 25 + 700

=5625