Question

решите пожалуйста
2x^2+7x-9=0​

Answer 1

$2x^{2} + 7x - 9 = 0\D = 49 + 8*9 = 49 + 72 = 121 = 11^{2} \x1 = frac{-7 + 11}{4} = 1\x2 = frac{-7 - 11}{4} = -frac{18}{4}$