Y-2x=8
2x+3y=6
4y=14
y=14:4
y=3.5
2x+3×3.5=6
2x=-4.5
x=-2.25
Ответ: (-2.25 ; 3.5)
=3x2+5x-1=x2-4x
3x2+5x-1-x2+4x=o
2x2+9x-1=o
<span>(4a^5-0,2b^2)*(4a^5+0,2b^2)=
=16a</span>¹⁰-0.2a²*b⁴=
=16a¹⁰-(2/10)²*b⁴=
=16a¹⁰-(1/5)²*b⁴=
=16a¹⁰-(1/25)b⁴=
=16a¹°-0.04b⁴
(cosx - cos(1.5π + x)) / (2cos²x - sin2x) =