4. If a + -
=p and a = 0: then show that:
q3 +
+ 3 = p (p² – 3)
Answers
Answered by
1
Answer:
since , (p+q) = 3
cubing onboth the sides of the equation ,we get ( p+ q)3= 3 cube
by using the algebric indentity ( a+b)3 = a3+b3+ 3ab(a+b) , consider ( p+ q )3 = 3 cube, p3+ q3+ 3pq( p+q) = 3 cube , bow as p= 1/q, p3+ q3+ 3( 1/q)q ( p+ q) = 27 , ( also ,p+q =3 , we get ) p3+ q3 + 3 cube = 27, p3+ q3+ 9 = 27 , p3 + q3 = 27 - 9 = 18 ,..... there fore the value of p3+ q3 = 18 ..... ( i hope its hlep u)
Answered by
2
Answer:
P³ + q³ = 18...........
answer...... ⬆️⬆️
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