Maths-
General
Easy
Question
Use the product of sum and difference to find 32 × 28.
Hint:
The methods used to find the product of binomials are called special products.
Difference of squares is a case of a special product which occurs when we multiply a binomial by another binomial with the same terms but the opposite sign
The correct answer is: 896
32 can be written as (30 + 2) and 28 can be written as (30 - 2)
So, 32 × 28 can be written (30 + 2) × (30 - 2)
(30 + 2) × (30 - 2) = 30(30 - 2) + 2(30 - 2)
= 30(30) + 30(-2) + 2(30) + 2(-2)
= 900 - 60 + 60 - 4
= 900 - 4
= 896
Final Answer:
Hence, the simplified form of 32 × 28 is 896.
Final Answer:
Hence, the simplified form of 32 × 28 is 896.
This question can be easily solved by using the formula
(a + b)(a - b) = a2 - b2
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