Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 9th
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What should be added to 2x3 + 6x2 – 5x + 8 to get 3x3 – 2x2 + 6x + 15? - Mathematics

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Sum

What should be added to 2x3 + 6x2 – 5x + 8 to get 3x3 – 2x2 + 6x + 15?

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Solution

3x3 – 2x2 + 6x + 15 – (2x3 + 6x2 – 5x + 8)

= 3x3 – 2x2 + 6x + 15 – 2x3 – 6x2 + 5x – 8

= 3x3 – 2x3 – 2x2 – 6x2 + 6x + 5x + 15 – 8

= x3 – 8x2 + 11x + 7

x3 – 8x2 + 11x + 7 must be added to get 3x3 – 2x+ 6x + 15.

Concept: Addition of Polynomials
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