Question

Упростите выражения:
А) (4x - 3)(8x + 6)
Б) 2y(y² - 1)(2 + y)
В) (9 + a² - 3a)(a² + 3a)
Г) (a - 2)(a - 3)(a + 1)
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Answer 1

A)

(4x-3)(8x+6)=2(4x-3)(4x+3)=2(16x²-9)=32x²-18

B)

2y(y²-1)(2+y)=2y³-2y)(2+y)=4y³+2y^4-4y-2y²=

=2y^4+4y³-2y²-4y

C)

(9+a²-3a)(a²+3a)=9a²+a^4-3a³+27a+3a³-9a²=a^4

D)

(a-2)(a-3)(a+1)=(a²-3a-2a+6)(a+1)=

=(a²-5a+6)(a+1)=a³-5a²+6a+a²-5a+6=a³-4a²+a+6