Math, asked by abdulla6132, 7 months ago

Answer the above attachment ⤴️​

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Answered by akhil5727
0

Answer:

1.-15

2.6x^2 + 3x + 3

3.6m^3 + 2m^2 - 5

Step-by-step explanation:

1. X= -2

5x + 2x - x^2 - x + 1

=. 5*-2 + 2*-2 - (-2)^2 - (-2) + 1

=. -10 + (-4) - (4) + 2 + 1

= -10 - 4 - 4 + 2 + 1

= -18 + 3

= -15 ans.

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 ans.

NO NEED OF BRACKET IN STEP 2 . I have used it here so that it becomes easy to understand

3.(6m^3 + 4m^2 - 1) - (2m^2 +4)

= 6m^3 + 4m^2 - 1 - 2m^2 - 4

= 6m^3 + 4m^2 - 2m^2 - 1 - 4

= 6m^3 + 2m^2 - 5 ans.

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