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Roninsongrant
25.06.2019 •
Mathematics
What is the solutions of the equation 2 (x+2) ^2-4=28
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Ответ:
x = 2 x = -6
Step-by-step explanation:
2 (x+2) ^2-4=28
Add 4 to each side
2 (x+2) ^2-4+4=28+4
2 (x+2) ^2= 32
Divide by 2
2/2 (x+2) ^2=32/2
(x+2)^2 = 16
Take the square root of each side
sqrt((x+2)^2) =±sqrt( 16)
x+2 = ±4
Subtract 2 from each side
x+2-2 = -2±4
x = -2±4
x = -2+4 and x = -2-4
x = 2 x = -6
Ответ:
4 3/4
Step-by-step explanation:
Just multiply 1 3/4 and 3 = 4 3/4