Question

1. (a) What should be added to x2 + 4xy +9 y? to obtain 2x2 + 7 xy ?​

Answer 1

Answer:

Let the number be = A

So,

(x²+4xy+9y) +(A) = (2x² +7xy)

A = (2x² +7xy)-(x²+4xy+9y)

A= 2x² +7xy -x²-4xy-9y

A = 2x²-x² +7xy-4xy -9y

A = x² +3xy-9y

is your answer

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