(x-5)(x+5)-x(x+3)6y-20(x+2)(x-6)-(x-7)(x+7)

June 2022 1 6 Report

(x-5)(x+5)-x(x+3)<x+1

(4-y)(y+4)+y(5+y)>6y-20

(x+2)(x-6)-(x-7)(x+7)<30-3x

x(8-3x)+11<3(7-x)(7+x)+8

Answers & Comments

maonang 1. $(x-5)(x+5)-x(x+3)\ \textless \ x+1$
$x^2-25-x^2-3x\ \textless \ x+1$
$-26-4x\ \textless \ 0$
$x\ \textgreater \ -6.5$

Ответ: x∈(6.5;+∞)
2. $(4-y)(y+4)+y(5+y)\ \textgreater \ 6y-20$
$16-y^2+5y+y^2\ \textgreater \ 6y-20$
$36-y\ \textgreater \ 0$
$y\ \textless \ 36$

Ответ: x∈(-∞;36)
3. $(x+2)(x-6)-(x-7)(x+7)\ \textless \ 30-3x$
$x^2-4x-12-(x-7)(x+7)-30+3x\ \textless \ 0$
$x^2-4x-12-(x^2-49)-30+3x\ \textless \ 0$
$x^2-4x-12-x^2+49-30+3x\ \textless \ 0$
$-4x-12+49-30+3x\ \textless \ 0$
$-4x+37-30+3x\ \textless \ 0$
$-4x+3x\ \textless \ -7$
$-x\ \textless \ -7$
$x\ \textgreater \ 7$

Ответ: x∈(7;+∞)
4. $x(8-3x)+11\ \textless \ 3(7-x)(7+x)+8$
$8x-3x^2-3(7-x)(7+x)\ \textless \ 8-11$
$-3x^2+8x-147+3x^2\ \textless \ -3$
$8x\ \textless \ 144$
$x\ \textless \ 18$

Ответ: x∈(-∞;18)

1 votes Thanks 3

Answers & Comments

sostavit sochinenie iz etih slov vezdehod vertolet vzaimopomosh vodoprovod

opredilite fenotip otca esli u rebenka bolshie svetlye glaza a u materi malen

2 kb izvestno chto ugol sab 45 gradusov ugol skb60 gradusov dokazat chto a

v pryamougolnom treugolnike abc na gipotenuze ab vybrana tochka e tak chto acc3c794aa09ca92780ff15c30bb03b040d 44839

reshite uravnenie 6h2 4h27

1) m II n, y-? 2) m II n, c II d, x-?...

v pryamougolnom treugolnike abc na gipotenuze ab vybrana tochka e tak chto acc49b11c34a29e5d6a668e47d073188dbf 78633

v pryamougolnom treugolnike abc na gipotenuze ab vybrana tochka e tak chto acc

najti vse naturalnye chisla m i n kotorye udovletvoryayut uravneniyu 123

najdite kvadraty trehchlen px ax2 bx c esli x2 3x 2 p x 9x

рекомендуемые вопросы

Helpful Links

Helpful Social