Question

4. (a) What should be added to x2 + xy + y2 to obtain 2x2 + 3xy?
(b) What should be subtracted from 2a +8b+10 to get - 3a+ 7b+167
way from 3x2 - 4y2 + 5xy + 20 to
50-​

Answer 1

Step-by-step explanation:

a) let C be the unknown factor

x*2 + xy + y*2 + C = 2x*2 + 3xy

C = 2x*2 + 3xy - x*2 - xy -y*2

C = x*2 + 2xy - y*2

b) let D be the unknown factor

2a + 8b + 10 - D = -3a + 7b + 167

D = -3a + 7b +10 - 2a - 8b - 167

D = - 5a -b - 157

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Answer 2

4. (a) What should be added to x2 + xy + y2 to obtain 2x2 + 3xy?

(b) What should be subtracted from 2a +8b+10 to get - 3a+ 7b+167

way from 3x2 - 4y2 + 5xy + 20 to

50-

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