Question
Class 7MathematicsAlgebraic Expressions

Add:

(i) 3x2y, -5x2y, -x2y

(ii) a + b – 3, b + 2a – 1

Verified Answer

(i) 3x2y, -5x2y, -x2y

= 3x2y + (-5x2y) + (-x2y)

= 3x2y – 5x2y – x2y

= (3 – 5 – 1 )x2y

= -3x2y

(ii) a + b – 3, b + 2a – 1

= (a + b – 3) + (b + 2a – 1)

= a + b – 3 + b + 2a – 1

= a + 2a + b + b – 3 – 1

= 3a + 2b – 4