X^2=12x-40 solve this equation using the quadratic formula

Step-by-step explanation:

x^2 = 12 x-40

x² - 12x + 40 = 0

a = 1;  b = -12; c = 40

4ac - b² = 4*1*40 - (-12)² = 160 - 144 = 16

x = -b ± √4ac-b² i / 2a

 = -(-12) ± √ 16 i

          2 * 1

= (12 ± 4 i )/ 2

= 2( 6 ±  2i)

        2

=   6 ±  2i

it would be 6xy and -16xy.

6x = 48

i hope this . 6 cards each and a total of $48. dvide each side by 6 and you will have your answer.