Question

10.Add 5x2 + 9x + 6, 4x + 3x2 – 8 and 5 – 6x ​

Answer 1

Answer:

8x^2 + 7x + 3

Step-by-step explanation:

5x^2 + 9x + 6 + 4x + 3x^2 - 8 + 5 - 6x

= (5x^2 + 3x^2) + (9x + 4x - 6x) + (6 - 8 + 5)

= (8x^2) + (7x) + (3)

= 8x^2 + 7x + 3

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Answer 2

Answer:

Add$5x^2 + 9x + 6, 4x + 3x^2 - 8$ and $5 - 6x$ ​ we get $8x^2 + 7x + 3$.

Step-by-step explanation:

$(5x^2 + 9x + 6) + (4x + 3x^2- 8) + (5 - 6x​)$

Remove bracket

$= 5x^2 + 9x + 6 + 4x + 3x^2 - 8 + 5 - 6x$

Rearrange similar terms

$= 5x^2 + 3x^2 + 9x+ 4x - 6x + 6 - 8 + 5 \\= (5 + 3 )x^2 + (9+ 4 - 6)x + ( 6 -8+5)\\= 8x^2 + 7x + 3$