Answer the above attachment ⤴️
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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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