Question

7. If + 5y = 10; find the value of x3
+ 125y3 + 150 xy - 1000,​

Answer 1

Step-by-step explanation:

5y = 10

y= 10/5

y=2

x3 + 125y3 + 150 xy -1000

substitute y=2

x3 + 125 (2)3 +150 x(2) -1000

x3 +125(8) +300x-1000

x3+1000 +300x-1000

x3+300x =0

x(x2+300)=0

x2+300=0

x2=-300

x=√-300