☆начертите график ♡ y=3x+4 x- 2, 5, 1, 4, 3, 10 y- 10, 19, 7, 16, 13, 14

Question

Алгебра: ☆начертите график ♡ y=3x+4 x- 2, 5, 1, 4, 3, 10 y- 10, 19, 7, 16, 13, 14

okcanaceninap06wvq · Accepted Answer

1) (х+5)²-х²=х-2
х²+10х+25 -х²=х-2
10х-х= -2-25
9х=-27
х=-27÷9
х=-3
Проверим:
(-3+5)²-(-3)²=-3-2
2²-3²=-5
4-9=-5
-5=-5

2) (3х+1)²- (3х-1)²=х+5
9х²+6х+1-(9х²-6х+1)=х+5
9х²+6х+1-9х²+6х-1=х+5
12х-х=5
11х=5
х=5/11
Проверим
(3*5/11 +1)²- (3*5/11-1)²= 5/11+5
(15/11+ 11/11)² - (15/11-11/11)²= 5 5/11
(26/11)² - (4/11)² = 5 5/11
(676-16)/ 121 = 5 5/11
660/121 = 5 5/11
60/11 = 5 5/11
5 5/11 = 5 5/11

3) (2у-1)³+(2у+1)³= у (1+16у²)+2
(2у)³- 3*4у² + 3*2у*1² - 1³ + (2у)³ + 3*4у²+3*2у*1² +1³= у+16у³+2
16y³+12y -y -16y³=2
11y=2
y=2/11

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