Question

5. What must be added to 2ry - 5x + 7 to get the sum - 5xy2? + 7x - 9?​

Answer 1

Step-by-step explanation:

Let a be added to 2x

2

y

2

−5x+7 to get the sum −5x

2

y

2

+7x−9

⇒a+(2x

2

y

2

−5x+7)=−5x

2

y

2

+7x−9

⇒a=−5x

2

y

2

+7x−9−(2x

2

y

2

−5x+7)

⇒a=−5x

2

y

2

+7x−9−2x

2

y

2

+5x−7

⇒a=−7x

2

y

2

+12x−16

Thus, −7x

2

y

2

+12x−16 is to be added to get the sum.