Question

Решить уравнения 7 x^2-28=0

Answer 1

7х² - 28 = 0
7х² = 28
х² = 28 ÷ 7
х² = 4
х = ± 2.
Ответ : х = ± 2.
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Удачи))))

Answer 2

To solve the quadratic equation 7x^2 - 28 = 0, you can follow these steps:

Step 1: Move the constant term to the other side of the equation: 7x^2 = 28

Step 2: Divide both sides of the equation by the coefficient of x^2 to isolate x^2: x^2 = 28/7

Step 3: Simplify the right-hand side: x^2 = 4

Step 4: Take the square root of both sides to solve for x: x = ±√4

Step 5: Find the two solutions for x: x = ±2

So the solutions to the equation are x = 2 and x = -2.