Question

(4x + 9) is multiplied to (4x – 9)

Answer 1

Answer:

$(4x + 9)(4x - 9) \\ {16}^{2} - 36x + 36x - 81 \\ {16}^{2} - 81$

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Answer 2

Answer:

The result will be $(4x+9)(4x-9)=16x^{2} -81$

Step-by-step explanation:

In accordance with the information provided in the question,

We have find the value of the supplied expression in the above question.

Given the data in question (4x + 9) is multiplied to (4x – 9)

As the given equation is in form of $(a+b)(a-b)$

So, for finding the value of the expression we will first multiply "a" with "c" and a with  "d" and then multiply "b" with "c" and b with "d", and then add the resultant value.

So, value of expression we will be

$ac-ad+bc-bd$

$(4x+9)(4x-9)= (4x\times 4x)- (4x\times9)+(9\times 4x)-(9\times9)\\16x^{2} -36x+36x-81$

The negative 36 and positive 36 are cancel

$16x^{2} -81$

Hence the result will be $(4x+9)(4x-9)=16x^{2} -81$