Question

What is the first step in solving the quadratic equation -5x2+8=133?

Answer 1

Answer:

b. The first step in the equation solving is subtracting 8 from both sides of the equation.

Step-by-step explanation:

Here, the given quadratic equation is : $-5x^2 + 8 = 133$

Let us try and solve this given equation.

$-5x^2 + 8 = 133 \\\implies -5x^2 + 8 - 8 = 133 -8\\\implies -5x^2 = 125\\\implies x^2 =\frac{125}{-5} = -25\\\implies x^2 = -25 = (5i)^2$

So, x  = ± 5i

Hence, as we can see here, the first step in the equation solving is subtracting 8 from both sides of the equation.