find the value of (2x+7)^3
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Step-by-step explanation:
(2x+7)³
using the identity,
(a+b)³ = a³+b³+3ab(a+b)
(2x+7)³ =(2x)³+7³+3(2x)(7)(2x+7)
= 8x³+ 343 +42x(2x+7)
= 8x³ + 343 + 84x²+294x
=>(2x+7)³= 8x³ + 84x²+294x+343
hope it helps.........
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