1) 12х²- 5х - 2 = 0 2) х² – 6х +9 = 0. Created by sm3rtn1k. algebra-ru

1) 12х²- 5х - 2 = 0 2) х²

sm3rtn1k @sm3rtn1k

July 2022 1 39 Report

1) 12х²- 5х - 2 = 0
2) х² – 6х +9 = 0

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NNNLLL54

Verified answer

$1)\; \; 12x^2-5x-2=0\; \; ,\; \; D=25+4\cdot 12\cdot 2=121\; ,\\\\x_1=\frac{5-11}{24}=\frac{-6}{24}=-\frac{1}{4}\\\\x_2=\frac{5+11}{24}=\frac{16}{24}=\frac{2}{3}\\\\\\2)\; \; x^2-6x+9=0\; \; ,\; \; \; (x-3)^2=0\; \; ,\; \; x-3=0\; \; ,\; \; x=3$

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