Question

8 - 27b³ - 343c³ - 126bc​

Answer 1

Answer:

8-27b³-343c³-126bc

=(2)³+(-3b)³+(-7c)³-3(2)(-3b)(-7c)

=(2-3b-7c)[(2)²+(-3b)²+(-7c)²-(2)(-3b)-(-3b)(-7c)-(-7c)(2)]

=(2-3b-7c)(4+9b²+49c²+6b-21bc+14c)......☺

Step-by-step explanation:

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