add the following polynomials:
a) 3a + 2b: 6a + 9b,
b) 5x^3 + 7x +3; 12x^2 - 3x + 8; 6x^2 - 4x + 9
c) 4x^2 - 7xy + 6y^2; 4x^2 + 7xy - 6y^2 + 4xy - 8y^2
d) 2 - x - x^2; x^2 + x + 3; 4x^2 + 5x + 7
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Answer:
Ansa) 9a + 11b
Ansb) 5x^3 +16x^2 +12
Ansc)
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(i) x3 -2x2y + 3xy2- y3, 2x3- 5xy2 + 3x2y - 4y3 ... (ii) 5x3 + 7 + 6x - 5x2, 2x2 – 8 - 9x, 4x - 2x2 + 3 x 3, 3 x 3 - 9x - x2 and x - x2 - x3 ... Add x2 + 2xy + y2 to the sum of x2 - 3y2and 2x2 - y2 + 9.
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