pls answer my questions
Answers
Answer:
firstly put the value of X ,y,z and if this helpful to you plz mark me as brainlist also like my and and comments plz
Answer:
Step-by-step explanation:
Given
x = 2a square + 3b square - 5ab, y = b square - 3a square + 7ab, z = 6a square - b square + ab.
( 1 ) x + y - z
= ( 2a square + 3b square - 5ab ) + ( b square - 3a square + 7ab ) - ( 6a square - b square + ab )
= 2a square + 3b square - 5ab + b square - 3a square + 7ab - 6a square + b square - ab ( ∵ - × - = + , - × + = - )
= ( 2a square - 3a square - 6asquare ) + ( 3b square + b square + b square ) + ( - 5ab + 7ab - ab )
= ( 2a square - 9a square ) + ( 5b square ) + ( - 5ab - ab + 7ab )
= - 7a square + 5b square ( - 6ab + 7ab )
= - 7a square + 5b square + ab . Is the answer.