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<span>4a</span>²<span>-49b</span>²<span>/(2a+7b)</span>²=
=(2a-7b)*(2a+7b)/(2a+7b)^2=
=2a-7b/2a+7b
ОДЗ
x ≥ 0
( - 2x + 3)^2 = x^2
(-2x)^2 - 12x + 9 - x^2 = 0
4x^2 - 12x + 9 - x^2 = 0
3x^2 - 12x + 9 = 0 /:3
x^2 - 3x + 2 = 0
D = 9 - 8 = 1
x1 = ( 3 + 1)/2 = 4/2 = 2
x2 = (3 - 1)/2 = 2/2 = 1
Ответ
1; 2
F(-x) = -0.5*sin(-x)
sin(-x)=-sinx
f(-x)=0.5sinx|*4
4f(-x)=2sinx