Question

Алгебра 7 класс 1)Решите уравнения (х+11)^2-х^2=11 2)44+z^2=(12+z)^2

Answer 1

1) (x+11)^2-x^2=11

x^2+2*11*x+121-x^2=11

22x=11-121

22x=-110

x= -5

2) 44+z^2=(12+z)^2

44+z^2= 144 + 2*12*z + z^2

44-144 = 24z- z^2+z^2

24z = -100

z= - 100/24

z= -25/6