1.if p=2-a,prove that a3+6ap+p3-8=0

2.if x=2y+6,find the value of x3-8y3-36xy-216

Asked by deepa1973 | 14th Apr, 2014, 11:46: AM

Expert Answer:

The answer to the first question is given below. The 'Ask the Expert' subscription  allows you to post only one question at a time. We request you to re-post the second question again.

1.

If p= 2-a

a = 2-p

a3+ 6ap + p3-8

(2-p)3+ 6p(2-p) + p3-8

8 - p3- 6p(2-p) + 6p(2-p) + p3- 8

= 0

Answered by  | 14th Apr, 2014, 12:36: PM

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