Question

Упростите выражения
а) a*(2a-1)+(a+3)(a-5)
б)(p+3c)*c-(3c+p)(c-p)

Answer 1

a)  a*(2a-1)+(a+3)(a-5) = 2a²-a+a²-5a+3a-15 = 3a²-3a-15
б) (p+3c)*c-(3c+p)(c-p) = pc+3c²-(3c²-3pc+pc-p²) = pc+3c²-3c²+2pc+p² = 3pc+p²