Solve for x : 2(x^2+9)-4=0
2 answers:
Answer:
x = ±i sqrt(7)
Step-by-step explanation:
2(x^2+9)-4=0
Add 4 to each side
2(x^2+9)-4+4=0+4
2(x^2+9)=4
Divide by 2
2(x^2+9)/2=4/2
(x^2+9)=2
Subtract 9 from each side
x^2 +9-9 = 2-9
x^2 = -7
Taking the square root of each side
sqrt(x^2) =sqrt(-7)
x = sqrt(-1 *7)
x = ±i sqrt(7)
Answer:
no solution
Step-by-step explanation:
multiply 2 and get 2x^2+18-4=0
combine like terms
2x^2+14=0
subtract 14
2x^2=-14
there can't be a square root of a negative number so there's no solution
You might be interested in
Answer:
the answer is 8
Step-by-step explanation:
You would do use the equation (3×2)+2=8
Hope this helps :)
Answer:
not sure
Step-by-step explanation:
0 only 2
Answer:
115.38 divided by 8 equals 14.4225
Step-by-step explanation:
Answer:
no solution
Step-by-step explanation:
8(3x-6)=6(4x+8)- remove the parentheses
24x-48=24x+48 - then you cancel the equal terms
-48=48
that is false showing that there is no solution
Answer:
9
It is 9 because 9 is the only number that multiplied by itself is 81.