Question

Ребят, плиииииииззз пожалуйста помогите, и если можно то с фотографией!!!

Answer 1

$4 {x}^{2} = 16x \ 4 {x}^{2} - 16x =0 \ d = 256 - 4 times 4 times 0 = 256 \ x1 = frac{16 + 16}{2 times 4} = frac{32}{8} = 4 \ x2 = frac{16 - 16}{2 times 4} = frac{0}{8} = 0$

$5 {x}^{2} + 14x - 3 = 0 \ d = 196 - 4 times 5 times ( - 3) = 196 + 60 = 256 \ x1 = frac{ - 14 + 16}{2 times 5} = frac{2}{10} = frac{1}{5 } \ x2 = frac{ - 14 - 16}{2 times 5} = frac{ - 30}{10} = - 3$
$36 {x}^{2} - 25 = 0 \ d = 0 - 4 times 36 times ( - 25) = 0 + 3600 = 3600 \ x1 = frac{0 + 60}{2 times 36} = frac{60}{72} = frac{5}{6} \ x2 = frac{0 - 60}{2 times 36} = frac{ - 60}{72} = frac{ - 5}{6}$