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natabooms
@natabooms
July 2022
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ПОМОГИТЕ РЕШИТЬ 2 ПРИМЕРА ТОЛЬКО РАСКРЫТЬ СКОБКИ 0,2x (5x+3)=?
-0,5x (4,2x-0,7)
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zhenyaM2002
Verified answer
0.2 × (5x+3) = 0.2×5x +0.2×3 = x +0.6
-0.5 ×(4.2x - 0.7) = -0.5×4.2x - 0.5 × (-0.7)=- 2.1x + 0.35
если × в условии - читается как переменная Х :
0.2x (5x+3) = 0.2x × 5x + 0.2x × 3 = x²+0.6x
-0.5x(4.2x-0.7) = -0.5x × 4.2x - 0.5x × (-0.7) = - 2.1x² + 0.35x
2 votes
Thanks 1
vlad230803
0.2x×5x+0.2x×3=1x+0.6x=1.6x
-0.5x×4.2x-0.7=-2.1x+0.35x=-1.75
1 votes
Thanks 1
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Verified answer
0.2 × (5x+3) = 0.2×5x +0.2×3 = x +0.6-0.5 ×(4.2x - 0.7) = -0.5×4.2x - 0.5 × (-0.7)=- 2.1x + 0.35
если × в условии - читается как переменная Х :
0.2x (5x+3) = 0.2x × 5x + 0.2x × 3 = x²+0.6x
-0.5x(4.2x-0.7) = -0.5x × 4.2x - 0.5x × (-0.7) = - 2.1x² + 0.35x
-0.5x×4.2x-0.7=-2.1x+0.35x=-1.75