Question

288. Найдите значения зависимой переменной у, где у = х² + 2x для заданных x: 1) x = 0,5; = 5) x = -6; 1 2) х ; x = 3 6) x = -3,1. 3) x = 5; 4) x = -0,2; = ЛЮДИ ВЫРУЧИТЕ ПОЖАЛУЙСТА ПЖЖЖЖЖЖЖЖЖ​

Answer 1

$y = {x}^{2} + 2x$

$x = 0.5 \\ y = (0.5) {}^{2} + 2 \times 0.5 = \\ 0.25 + 1 = 1.25$

$x = - 6 \\ y = ( - 6) {}^{2} + 2 \times ( - 6) = \\ 36 - 12 = 24$

$x = 3 \\ y = {3}^{2} + 2 \times 3 = 9 + 6 = 15$

$x = - 3.1 \\ y = ( - 3.1) {}^{2} + 2 \times ( - 3.1) = \\ 9.61 - 6.2 = 3.41$

$x = 5 \\ y = {5}^{2} + 2 \times 5 = 25 + 10 = 35$

$x = - 0.2 \\ y = ( - 0.2) {}^{2} + 2 \times ( - 0.2) = \\ 0.04 - 0.4 = - 0.36$