factorise (1 + 7x)² + (49x² - 1)
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Step-by-step explanation:
(1+7x)²+(7x-1)²
(1+7x)²+(7x+1)(7x-1)
(1+7x){(1+7x)+(7x-1)}
(1+7x)(1-7x)²
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I hope it will help you
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