Answer:
Step-by-step explanation:
Given p = x²+6
We are to express (x²+6)-21 = 4x²+24 in terms of p
We need to rewrite the expression first
(x²+6)²-21 = 4x²+24
Factor out 4 from the right hand side;
(x²+6)²-21 = 4(x²+6)
Replace x²+6 with p
p²+21 = 4p
Collect like terms
p²-4p = -21
p²-4p+21= 0
Hence the required equation is p²-4p+21= 0