sederhanakan hasil A. 2c-(c-d) B. 5c-(c-d) C. 12-(1-x) D. 10-(1-2) E. 6x(x+2) F. 8n-(4-7n)

Mapel : Matematika
Kelas : VII SMP
Bab : Aljabar

Pembahasan :
2c - (c - d)
= 2c - c + d
= (2 - 1)c + d
= c + d

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5c - (c - d)
= 5c - c + d
= (5 - 1)c + d
= 4c + d

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12 - (1 - x)
= 12 - 1 + x
= 11 + x

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10 - (1 - 2)
= 10 - (-1)
= 10 + 1
= 11

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6x(x + 2)
= (6x)(x) + (6x)(2)
= 6x² + 12x

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8n - (4 - 7n)
= 8n - 4 + 7n
= (8 + 7)n - 4
= 15n - 4