Question

(3x - 8)2 - (4x - 6)2 + (5x - 2)(5x + 2) = 96

Answer 1

Ответ:

(3x-8)2-(4x-6)2+(5x-2)(5x+2)=96

6x-16-8x+12+25x²+4=96

-2x-8+25x²=96

25x²-2x-104=0

25x²+50x-52x-104=0

25x(x+2)-52(x+2)=0

(x+2)(25x-52)=0

x+2=0

x1=-2

25x-52=0

x2=52/25

ответ: х1=-2

х2=52/25=2.08