Question

2) resolva as equações aplicando a fórmula de Bháskara

Answer 1

Explicação passo a passo:

3x² - 7x + 2 = 0

$a=3\\ b=-7\\ c=2\\ \\ \Delta=b^2-4ac\\ \Delta=(-7)^2-4(3)(2)\\ \Delta=49-24\\ \Delta=25\\ \\ \\ x={-b\pm\sqrt{\Delta} \over2a}={-(-7)\pm\sqrt{25} \over2.(3)}={7\pm5\over6}\\ \\ x'={7+5\over6}={12\over6}=2\\ \\ x"={7-5\over6}={2\over6}={1\over3}\\ \\ \\ As~~ra\'izes~~s\tilde{a}o~~{1\over3}~~~e~~~2$