Формула a^2-b^2=(a-b)(a+b)
49a^2-64q^2=
![7^{2}a^{2}-8^{2}q^{2}](https://tex.z-dn.net/?f=+7%5E%7B2%7Da%5E%7B2%7D-8%5E%7B2%7Dq%5E%7B2%7D)
= (7a-8q)(7a+8q)
0,6X^2 + 0,8X - 7,8 = 0
6X^2 + 8X - 78 = 0
2 * ( 3X^2 + 4X - 39 ) = 0
D = 16 + 468 = 484 ; √ D = 22
X1 = ( - 4 + 22 ) : 6 = 3
X2 = ( - 4 - 22 ) : 6 = - 4 ( 1/3 )
32bp - одночлен
k=32 - коэффициент одночлена