using suitable identities find the product of 7 - 2x into 7 + 2x
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- Using identity, evaluate
We know that,
Therefore,
Applying the identity, we get
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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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