(<u>17</u> +<u> 3)</u> : <u>5 </u>=(<u>17*8+3*35</u>) *<u> 28 </u>= <u>136+105 </u>* <u> 28 </u> = <u>241</u> =4,82
(35 8) 28 ( 35*8 ) 5 280 5 50
17ab-(ab+8a^2+2b^2+16ab)=17ab-ab-8a^2-2b^2-16ab=-8a^2-2b^2=-2(4a^2+b^2)
2x²+3x-2=0
a=2 ; b=3 ; c=-2
D=√9+16=√25=5.
-3+5 2
x₁ = _____ = ____ = 0,5.
4 4
-3-5 -8
x₂ = ____ = ____ = -2.
4 4
Ответ : -2 ; 0,5.
1-x^2+2xy-y^2=1-(х-y)^2=(1-x+y)(1+x-y)
ab^2-b^2y-ax+xy+b^2-x =b^2(a-y+1)-x(a-y+1)=(a-y+1)(b^2-x)