Question

31.11 докажите тождество​

Answer 1

31.11

$1) {x}^{2}-2.56 + 5 - {x}^{2} = 2.44 \\ 2.44 = 2.44$

$2)4 - {0.81x}^{2}- 10 + 0.81 {x}^{2} = - 6 \\ - 6 = - 6$

$3) {x}^{2} - 2.25 +36 - {x}^{2} = 33.75 \\ 33.75 = 33.75$

$4)4.41-{x}^{2}-25 + {x}^{2} = - 20.59 \\ - 20.59 = - 20.59$