Question

(х+5) в квадрате - (х-1)в квадрате=48

Answer 1

(х+5)²-(х-1)²=48,
х²+10х+25-(х²-2х+1)=48,
х²+10х+25-х²+2х-1=48,
12х+24=48,
12х=48-24,
21х=24,
х=24:12,
х=2.
Ответ: 2.

Answer 2

х²+10х+25-(х²-2х+1)=48
х²+10х+25-х²+2х-1=48
12х+24=48
12х=48-24
12х=24
х=2