Question

if x= 7y+3 and z= 49y^2 then what is 'z' in term of x?

Answer 1

Heya !!




X = 7Y + 3






7Y = ( X - 3 )



Y = ( X - 3 ) / 7





And,




Z = 49Y²




Z = 49 × ( X - 3 /7)²







=> 49 × ( X - 3 )² / 49






=> ( X - 3 )²




=> X² + (3)² - 2 × X × 3



=> X² + 9 - 6X



=> X² - 6X + 9.






Z = X² - 6X + 9



Hence,



Value of Z in terms of X = X² - 6X + 9.