Question

Помогите с алгеброй!!

Answer 1

b^2+20b+100=(b+10)^2
16m^2-64n^2=(4m-8n)(4m+8n)

x+x^2+(5-x)(5+x)=26
x+25=26
x=1

(3x-4)(3x+4)=9x^2-4x
-16=-4x
x=4