Question

please Answer the above questions please.
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Correct Answer BRAINLIEST.
(WITH EXPLAINATION )​

Answer 1

Step-by-step explanation:

1) x=-2

5×-2+2×-2-(-2)^2-(-2)+1

-10+-4-4+2+1

-14-4+3

-18+3

=-15

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

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

6x^2+3x+3

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Answer 2

$\huge{\pink{\underline{\underline{\purple{SOLUTION:-}}}}}$

[1] 5x + 2x - x² - x + 1

=> 6x - x² + 1

When x = -2

=> 6 × (-2) - (-2)² + 1

=> -12 - 4 + 1

=> -16 + 1

=> -15

[2] [6 + 4x + 2x²] + [3x² + 5 + 2x] + [x² - 3x - 8]

=> 2x² + 3x² + x² + 4x + 2x - 3x + 6 + 5 - 8

=> 6x² + 3x + 3

[3] [6m³ + 4m² - 1] - [2m² + 4]

=> 6m³ + 4m² - 2m² - 1 - 4

=> 6m³ + 2m² - 5