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7.5 × 7.5 + 37.5 + 2.5 × 2.5=?
  • a)
    100                             
  • b)
    80            
  • c)
    60                               
  • d)
    30
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
7.5 × 7.5 + 37.5 + 2.5 × 2.5=?a)100 b)80 c)60 d)30Correct ...
(7.5)2 + 2 × 2.5 × 7.5 + (2.5)2 = (7.5 + 2.5)2
= (10)2 = 100
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Most Upvoted Answer
7.5 × 7.5 + 37.5 + 2.5 × 2.5=?a)100 b)80 c)60 d)30Correct ...
It's in the form of (a+b) ^2= a^2 + 2ab + b^2
a= 7.5, b=2.5

(7.5+2.5) ^2 = 100

another way
7.5×7.5 =56.25
2.5× 2.5 is 6.25
(56.25+6.25+37.5) = 100
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Community Answer
7.5 × 7.5 + 37.5 + 2.5 × 2.5=?a)100 b)80 c)60 d)30Correct ...
Calculation:
Let's break down the given expression step by step:

Step 1: Calculate 7.5 × 7.5
7.5 × 7.5 = 56.25

Step 2: Add 37.5 to the result from Step 1
56.25 + 37.5 = 93.75

Step 3: Calculate 2.5 × 2.5
2.5 × 2.5 = 6.25

Step 4: Add the result from Step 2 to the result from Step 3
93.75 + 6.25 = 100
Therefore, the final result of the expression 7.5 × 7.5 + 37.5 + 2.5 × 2.5 is 100.
So, the correct answer is option 'A' - 100.
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