Use the completing the square method to find the roots of 2x^2+3x-15=13 include the steps, it would be greatly appreciated

The roots are

Step-by-step explanation:

we have

so

Group terms that contain the same variable, and move the constant to the opposite side of the equation

Factor the leading coefficient  

Complete the square. Remember to balance the equation by adding the same constants to each side

Rewrite as perfect squares

square root both sides

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

answer: the angel abc is 30°,and the abc is a triangle where the angel bac is 90°

so ac is the half of 24=12ft,and from the pythagorean theorem we find ba

ba=√bc^2-ac^2=√576-144=√432=12√3ft

so bac is 12+12√3=12(1+√3)ft