1.(2x+4)+(6x-2) 2.(3y-5)+(-7y+5) 3.(8×2+4x-21)+(6×2-14x+7) PAKAI CARA Y KA

1. (2x+4)+(6x-2)
    = 12x² + 4x + 24x -8
    = 12x² + 28x – 8

2. (3y-5)+(-7y+5)
    = 21y² + 15y + 35y – 25
    = 21y² + 50y -25

3. (8x² + 4x – 12) + (6x² – 14x +7)
    = 48x⁴ – 112x³ + 56x + 24x³ – 56x² + 28x – 72x² + 168x – 84
   = 48x⁴ – 88x³ – 188x² + 252x – 84

jika benar mohon klik terima kasih dan beri 5 bintang

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