Question

(x-9)(x-3)-(x-8)(x+8)=-5 чему равен x ?

Answer 1

x²-3x-9x+27-x²+64=-5
-12x=-5-91
-12x=-96
x=8

Answer 2

(х-9)(х-3) - (х-8)(х+8) = -5
х^ - 3х - 9х + 27 - (х^ + 8х - 8х - 64) = -5
х^ - 3х - 9х + 27 - х^ - 8х + 8х + 64 = -5
-12х + 91 = -5
-12х = -96
х= 8.
Ответ: 8.