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Maths-

General

Easy

Question

(ℎ + 𝑘)(ℎ − 𝑘) =

ℎ² + 𝑘²
ℎ² − 𝑘²
𝑘² − ℎ²

hint 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: ℎ² − 𝑘²

(h + k)(h - k) = h(h - k) + k(h - k)
= h(h) + h(-k) + k(h) + k(-k)
= h² -hk + hk - k²
= h² - k²
Final Answer:
The simplified form of (h + k)(h - k) is h² - k². Hence, option b is correct

This question can be easily solved by using the formula
(a + b)(a - b) = a2 - b2

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