Question

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 - 3x then 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
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Answer 1

Answer:

plz check your ques no.9.