Math, asked by toshininimbarte22, 9 months ago

using suitable identities find the product of 7 - 2x into 7 + 2x​

Answers

Answered by anindyaadhikari13
4

\star\:\:\bf\large\underline\blue{Question:-}

  • Using identity, evaluate (7 + 2x)(7 - 2x)

\star\:\:\bf\large\underline\blue{Solution:-}

We know that,

(x + y)(x - y) =  {x}^{2}  -  {y}^{2}

Therefore,

Applying the identity, we get

(7 + 2x)(7 - 2x)

 =  {(7)}^{2}  -  {(2x)}^{2}

 = 49 - 4 {x}^{2}

\star\:\:\bf\large\underline\blue{Answer:-}

  • 49 - 4 {x}^{2}
Answered by deve11
0

Step-by-step explanation:

(7 - 2x)(7 + 2x)

(a+b)(a-v)=a²-b²

(7 - 2x)(7 + 2x)=7²-(2x)²=49-4x².

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