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Perhatikan pernyataan di bawah ini! (i) 12 x 2 − 14 x = 2 x ( 6 x − 7 ) (ii) 6 x 2 + x − 21 = ( 3 x + 7 ) ( 2 x − 3 ) (iii) 2 x 2 − 5 x − 25 = ( 2 x + 5 ) ( x − 5 ) (iv) 10 x 2 − 41 x + 27 = ( 2 x − 9 ) ( 5 x − 3 ) pernyataan yang benar adalah....

Perhatikan pernyataan di bawah ini!

(i)

(ii)

(iii)

(iv)

pernyataan yang benar adalah....

  1. (i) dan (ii)

  2. (ii) dan (iii)

  3. (iii) dan (iv)

  4. (i) dan (iii)
     

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R. RGFLSATU

Master Teacher

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Pembahasan

straight I. space space space 12 straight x squared minus 14 straight x equals 2 straight x open parentheses 6 straight x minus 7 close parentheses  space space space space space space 2 straight x open parentheses 6 straight x minus 7 close parentheses  space space space space space space equals 12 straight x squared minus 14 straight x space left square bracket Benar right square bracket  II. space space 6 straight x squared plus straight x minus 21 equals open parentheses 3 straight x plus 7 close parentheses open parentheses 2 x minus 3 close parentheses  space space space space space space open parentheses 3 straight x plus 7 close parentheses open parentheses 2 x minus 3 close parentheses  space space space space space space equals 6 x squared minus 9 x plus 14 x minus 21  space space space space space space equals 6 x squared plus 5 x minus 21 space left square bracket S a l a h right square bracket  III. space 2 straight x squared minus 5 straight x minus 25 equals open parentheses 2 straight x plus 5 close parentheses open parentheses straight x minus 5 close parentheses  space space space space space space open parentheses 2 straight x plus 5 close parentheses open parentheses straight x minus 5 close parentheses  space space space space space space equals 2 straight x squared minus 10 straight x plus 5 straight x minus 25  space space space space space space equals 2 straight x squared minus 5 straight x minus 25 space left square bracket Benar right square bracket  IV. space 10 straight x squared minus 41 straight x plus 27 equals open parentheses 2 straight x minus 9 close parentheses open parentheses 5 straight x minus 3 close parentheses  space space space space space space space open parentheses 2 straight x minus 9 close parentheses open parentheses 5 straight x minus 3 close parentheses  space space space space space space space equals 10 straight x squared minus 6 straight x minus 45 straight x plus 27  space space space space space space space equals 10 straight x squared minus 51 straight x plus 27 space left square bracket Salah right square bracket

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