Maths-
General
Easy

Question

Find the product. (𝑥 + 9)(𝑥 + 9)

Hint:

The methods used to find the product of binomials are called special products.
Multiplying a number by itself is often called squaring.
For example (x + 3)(x + 3) = (x + 3)2

The correct answer is: 81


    (x + 9)(x + 9) = x(x + 9) + 9(x + 9)

    =  x(x) +  x(9) + 9(x) + 9(9)

    = x2 + 9x + 9x + 81

    = x2 + 18x + 81
    Final Answer:
    Hence, the simplified form of (𝑥 + 9)(𝑥 + 9) is x2 + 18x + 81
     

    This question can be easily solved by using the formula
    (a + b)2 = a2 + 2ab + b2  

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