Question

ПОМОГИТЕ СДЕЛАТЬ 4 НОМЕРА ПО АЛГЕБРЕ!!!!!!!!!

Answer 1

Объяснение:

№1

1,5х³–2,4х при х=–2

1,5*(–2)³–2,4*(–2)= 1,5*(–8)+4,8= –12+4,8= –7,2

№2

(8x²–x+3)+(–2x²+4x–5)= 8x²–x+3–2x²+4x–5= 6x²+3x–2

№3

a) –4a³(a²–3a+2)= –4(a^5)+12a⁴–8a³

b) (1–x)(2y+x)= 2y+x–2xy–x²

c) (5c–4)² = 25c²–40c+16

№4

a) 3a(a–b)+b(2a–b)= 3a²–3ab+2ab–b²= 3a²–ab–b²

b) (c–3)²–3c(c–2)= c²–6c+9–3c²+6c= –2c²+9