find the product by using suitable identity (4-7x) (16+28x+49x^2)
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Step-by-step explanation:
(4-7x) (16+28x+49^2)
4(16+28x+49x) -7x(16+28x+49x²)
(64+112x+196x²)-(112x+196x²+343x³)
64+112+196x²-112x196x²-343x³
64-343x³
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