9x² - 1 = ( 3x - 2 ) ²

Question

9x² - 1 = ( 3x - 2 ) ²

Answer 1

9х²-1=9х²-4-12х 9х²-9х²=-1+4. 9х²-9x²+12х=3 12х=3 х=3\12 х=1\4

Comments

cgfcb,j ,jkmijt

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спасибо большое