решить: 1) 7+|х|=10.5;2) (3х-6) (х+5)=03) 4(х+1)= -(х+11). Created by chernyshova117. matematika-ru

Пошаговое объяснение:1) |х|=10,5-7|х|=3,5х1= 3,5 х2=-3,52) 3) 4х+4=-х-115х= - 15х=-3

решить: 1) 7+|х|=10.5;2) (3х-6) (х+5)=03) 4(х+1)= -(х+11)...

chernyshova117 @chernyshova117

July 2022 1 4 Report

решить:
1) 7+|х|=10.5;
2) (3х-6) (х+5)=0
3) 4(х+1)= -(х+11)

Answers & Comments

blackmday12

Пошаговое объяснение:

1) |х|=10,5-7

|х|=3,5

х1= 3,5 х2=-3,5

$3 {x}^{2} + 15x - 6x - 30 = 0 \\ 3 {x}^{2} + 9x - 30 = 0 \\ d = 81 - 4 \times 3 \times - 30 = 441 \\ x1 = 2 \\ x2 = - 5$

3) 4х+4=-х-11

5х= - 15

х=-3

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