Question
Class 7MathematicsAlgebraic Expressions

From the sum of 2x2 + 3xy – 5 and 7 + 2xy – x2 subtract 3xy + x2 – 2.

Verified Answer

Sum of the given term is (2x2 + 3xy – 5) + (7 + 2xy – x2)

= 2x2 + 3xy – 5 + 7 + 2xy – x2

= 2x2 – x2 + 3xy + 2xy – 5 + 7

= x2 + 5xy + 2

Now (x2 + 5xy + 2) – (3xy + x2 – 2)

= x2 + 5xy + 2 – 3xy – x2 + 2

= x2 – x2 + 5xy – 3xy + 2 + 2

= 0 + 2xy + 4

= 2xy + 4