Solve the equation.

3x^2 - 16x = x^2 - 30

A. 3,5

B. - 3/2,5

C. - 5,-3/2

D. - 3,-5

3x^2-16x=x^2-30

3x^2-x^2-16x+30=0

2x^2-16x+30=0

2 * (x^2-8x+15) = 0

x^2-8x+15=0

+1 + 1

we solve it by completing the square

x^2-2*4x+16=1

(x-4) ^2=1

x-4=1 or x-4 = - 1

+4 + 4 + 4 + 4

x=5 or x = 3 the answer is A