Question

(x-13) (x-15) = 23÷11^2​

Answer 1

Answer:

x = 15,13

Step-by-step explanation:

(x-13)(x-15) = x³ -13x-15x+(13)(15)

= x² -28x + 195

(x-13) (x-15) = 23/11^2

x² -28x + 195 = 23/121

121x² - 3388 x + 23595 = 23

121x² -3388x +23572 = 0

x = 3388 ±√(3388)² -4(121)(23572)/2(121)

x = 3388 ± √58564 /2(121)

= 3388 ± 242/242

x = 3388+242 /242

x = 14+1

= 15

or

x = 3388-242 /242

= 14-1

13