1. (x-2) x (x-7) = 2. (2x-1) x (1-x) = 3. (x² + 4x) x (3x-7) = 4. (x² + 4x) x (3x-7) =

Nomor 1:

(x – 2) (x- 7)

= x (x – 7) – 2 (x – 7)

= x^2 – 7x – 2x + 14

= x^2 – 9x + 14

Nomor 2:

(2x – 1) (1 – x)

= 2x (1 – x) – 1 (1 – x)

= 2x – 2x^2 – 1 + x

= – 2x^2 + 3x – 1

= 2x^2 – 3x + 1

Nomor 3:

(x^2 + 4x) (3x – 7)

= x^2 (3x – 7) + 4x (3x – 7)

= 3x^3 – 7x^2 + 12x^2 – 28x

= 3x^3 + 5x^2 – 28x

1.(x-2)×(x-7)=x2-7x-2x+14=x2-5x+14
2.(2x-1)×(1-x)=2x+2xpangkat 2 -1+1x
3.(x2+4x)×(3x-7)=3xpangkat2 -21x pangkat2+12xpangkat 2-28xpangkat2
4.(x2+4x)×(3x-7)=3xpangkat3-7xpangkat2+12xpangkat2 -28x