Question

2. Add the following:
(i) x2 + y2 + 2xy, 3-r2 + 12 – 4xy, x2 + y2
(ii) 3a + 4b, 10a - 9b, 16a + 2b
(iii) x²y + xy2, -11x2y + 10xy2, -10x2y – 11xy2
(iv) 14x2 + 2x + 5, 5x2 + 6
(v) 4abc + 6a2 + 7b, 10a2 + 14b, -2abc – 3a2
(vi) 2x2 + 4y2 + 5, – x2 + 3y2 + 10, –2x2 – 4y2
(vii) 6x3 – 3x2 + 6x – 4, 4x3 + 5x – 10, x2 – 6
10
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Answer 1

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Step-by-step explanation:

2.(i) x2 + y2 + 2xy, 3-r2 + 12 – 4xy, x2 + y2

solution: x2+y2+2xy

+r2-4xy+3+12

x2+y2+

______________________

2x2+2ry2+6xy+3+12

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ii) 3a + 4b, 10a - 9b, 16a + 2b

solution: 3ab+4b

-9b+10a

+2b+16a

____________________________

3ab+15b+28a

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(iii) x²y + xy2, -11x2y + 10xy2, -10x2y – 11xy2

solution: x²y+xy2

11x2y+10xy2

-11xy2-10x2y

____________________

13x2y+21xy2-10x2y

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(iv) 14x2 + 2x + 5, 5x2 + 6

solution: 14x2+2x+5

15x2+ +6

____________________

29x2+2x+11

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(v) 4abc + 6a2 + 7b, 10a2 + 14b, -2abc – 3a2

Solution: 6a2+7b+4abc

10a2+14b

-3a2 -2abc

____________________

19a2+21b+6abc

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(vi) 2x2 + 4y2 + 5, – x2 + 3y2 + 10, –2x2 – 4y2

solution: 2x2+4y2+5

-x2+3y2+10

-2x2-4y2

__________________

-4x2+11y2+15

__________________

(vii) 6x3 – 3x2 + 6x – 4, 4x3 + 5x – 10, x2 – 6

Solution: 6x-3x2+6x3-4

5x- +4x3-10

+x2 -6

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11x+3x2+10x3+20

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