Use the quadratic formula to solve the equation.
2x2 + 2x - 4= 0

x = 1 or -2

Step-by-step explanation:

x = (-b +- √b^2 - 4ac)/2a

x = (-2 +- √4 + 32)/4

x = (-2 +- √36)/4

x = (-2 +- 6)/4

We will add for the first solution

x = ( -2 + 6)/4 -> x = 4/4 -> x = 1

And now we subtract for the second solution

x = (-2 - 6)/4 -> x = -8/4 -> x = -2

There are your answers. Hope I helped!

,jkulgiurutrjyftkugyi.uykujuyxjdkytuf,yukj

step-by-step explanation:

explanation:

infrared radiation has wavelength in the range between 700 nm and 1 mm. lets' convert these values into scientific notation, keeping in mind that:

let's start from the lower value, we have:

(we moved the dot two places to the left, so we increased the exponent by 2 units, from -9 to -7)

the higher value is:

so, the range of wavelength of infrared radiation is: