Question

b) Add : x2 –xy + yz ; 2xy + yz -2x2 ; 3yz + 3x2 + xy. plz give full explaination​

Answer 1

x² - xy + yz + 2xy +yz - 2x² - adding the first two equations we don't need to convert any signs since we adding them since -*+ = -

x² - 2x² -xy + 2xy +yz +yz - putting similar terms together so we don't get confused

-x² +xy +2yz - After adding them (-2x² + x² gives - 1x² similarly 2xy-xy gives +xy

-x² +xy +2yz +3yz +3x² + xy - adding third equation

-x² + 3x² +xy + xy + 3yz + 2yz - re-aranging them

2x² + 2xy + 5yz - after adding them all