X1 = -1; x2 = 3.
c =x1 * x2 = - 1 * 3 = - 3;
- b = x1 + x2 = - 1 + 3 = 2; b = - 2
x^2 + b*x + c = 0;
x^2 - 2 x - 3 = 0.
2) x1 = - 4;
x2 = 0;
c = x1 * x2 = - 4 * 0 = 0;
- b = x1 + x2 = - 4 + 0 = - 4; b = 4
x^2 + b* x + c = 0;
x^2 + 4x = 0
<span>4(х-4)(х+8)=(3х+2)(х-5)+(х-1)(х+1);</span>
<span>4(x^2 - 4x + 8x - 32) = (3x^2 + 2x - 15x - 10) + (x^2 - x + x - 1);</span>
<span>4(x^2 + 4x - 32) = 3x^2 - 13x - 10 + x^2 - 1;</span>
<span>4x^2 + 16x - 128 = 4x^2 - 13x - 11;</span>
<span>16x + 13x = 128 - 11;</span>
<span>29x = 117;</span>
<span>x = 117/29 = 4 1/29;</span>
(4y³+15y) - (17y-y³) = 4y³ + 15y - 17y + y³ = 5y³- 2y