(4a³-3a²+6a⁴):(-a²)+7a⁵:(-7a) при a=2
(4*8 - 3*4 + 6*16):(4) + 7*32: (-14) = (32 - 12 +96):4 + 224:(-14) = 116:4 - 16= =29-16 =13
Ответ 5....................
X² + 2bx - 3 = 0
3² + 2b * 3 - 3 = 0
9 + 6b - 3 = 0
6b = - 6
b = - 1
x² - 2x - 3 = 0
D = ( - 2)² - 4 * 1 * ( - 3) = 4 + 12 = 16 = 4²
Ответ: b = - 1 , x₂ = - 1