Степень: 4
коэффициент: -7
3x-4y+1=0
x=2y+1
6y+3-4y+1=0
2y=-4
y=-2
x=-4+1
x=-3
(-3;-2)
2x+2=3x+1
2x-3x=1-2
-x=-1
x=1
-4х² + 4х - 1 = 0
4х² - 4х + 1 = 0
D = b² - 4ac = (-4)² - 4 * 4 * 1 = 16 - 16 = 0
x = -b/2a = -(-4)/(2 * 4) = 4/8 = 0,5
<span>(a^9-a^6+a^4):(-a^2)+(a+3)(a-3) =
a^2 * (a^7 - a^4 + a^2)
= ------------------------------- + a</span>^2 - 9 = a^2 - 9 - a^7 + a^4 - a^2 = <span>
-1 * a^2
= a^4 - a^7 - 9 = (-1)^4 - (-1)^7 - 9 = 1 + 1 - 9 = -7</span>