3 years ago

How do i do 2 x squared + 7=4

Mathematics

1 answer:

Trava [24]3 years ago

4 0

Answer:

x = ±i sqrt(3/2)

Step-by-step explanation:

2x^2+7 = 4

Subtract 7 from each side

2x^2+7-7 = 4-7

2x^2 = -3

Divide by 2 on each side

2x^2/2 = -3/2

x^2 = -3/2

There is no real solution, only imaginary solutions

Taking the square root of each side

sqrt(x^2) = sqrt(-3/2)

x = ±i sqrt(3/2)

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$||Solving \ for \ x. ||$ 

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