Long Answer Ques
8. If A = 4x2 - 6x +3, B = - 4x2 - 7x + 5 and C = 3x2 - 8x + 6, find 2A + 2B +2C.
9. If A = 2x2 + 3xy -- 5y, B = 2xy - 5x2 + 3y and C = - 2y2 + 5xy - 3xthen show that A -C + B = 0.
10. If X = 3x2 - 8 - 7x, Y = x2 + 8x - 3 and Z =-3x - 5x2 + 2, find
(a) x + Y + Z
(b) X-Y-Z
(C) X + Y-Z
11. How much is 3x2 + 4y2 - 4xy smaller than 5x2 + y2 - 6xy?
12. What should be added to 4x2-3xy + 7 to get 6x2 - 2xy - 8?
13. What should be subtracted from 3abc - a2 + 5b2 to get 8abc + 302 - 2b2?
14. From the sum of 812-31 m+ 4m2 - 8 and - 612-21 m+ 5m² - 2, subtract -612 +211 m - 2 m2 +6.
Answers
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Answer:
9x^2+4x-13
Step-by-step explanation:
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